Home
Supplier Discovery
Construction & Decoration
Metal Window
Insulation Window Factories & Companies
Filter
Category
Chemicals
Construction & Decoration
Electrical & Electronics
Manufacturing & Processing Machinery
Metallurgy, Mineral & Energy
More
Management Certification
ISO9001:2008
ISO14001:2004
Others
ISO9001:2015
ISO14001:2015
More
R&D Capacity
OEM
ODM
Own Brand
Others
Annual Revenue
<1 Million USD
1 ~ 2.5 Million USD
2.5 ~ 5 Million USD
5 ~ 10 Million USD
10 ~ 50 Million USD
More
No.of Employees
Less than 5 People
5-50 People
51-200 People
201-500 People
501-1000 People
More
Province & Region
Anhui
Beijing
Chongqing
Fujian
Gansu
More
about insulation window
Technological Innovation
Reliable Supply Chains
Substantial Manufacturing Capabilities
insulation window
3,000+ factories verified
Zhejiang Roomeye Energy saving Doors and Windows Technology Co., Ltd.
Send Inquiry
Kitchen Partition High Thermal Insulation Inside Opening and Tilting Window with CE
US$
70.00
-
200.00
10 Square Meters
(MOQ)
Serious High Thermal Insulation Inside Opening and Tilting Window with CE
US$
70.00
-
200.00
10 Square Meters
(MOQ)
High-Quality Tilt and Turn Aluminum Windows for Superior Insulation
US$
70.00
-
200.00
10 Square Meters
(MOQ)
Inward Opening Tilt Windows with Superior Sound Insulation
US$
70.00
-
200.00
10 Square Meters
(MOQ)
1/4
Foshan Himolon Home Technology Co., Ltd
9 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Hurricane Impact Window Insulation Triple Double Glazed Windows
US$
70.00
-
80.00
2 square meters
(MOQ)
Finished Heat Insulation Himolon Windproof Home Aluminum Inward Opening Glass Windows
US$
69.00
-
79.00
2 square meters
(MOQ)
Heat Sound Insulation Villa Aluminum Sliding Windows Thermal Break Window
US$
70.00
-
80.00
2 square meters
(MOQ)
T6063-T6 Aluminum Profile Casement Window Heat Insulation Double Tempered Glass Casement Window
US$
109.00
-
119.00
2 square meters
(MOQ)
1/4
V Global Manufacturing Limited
14 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
High-Performance Thermal Insulation Energy Saving Tempered Glass Frosted Privacy Design Modern Home Fix Window High Quality Aluminum Widnow Frames
US$
59.00
-
129.00
1 Square Meter
(MOQ)
Cheap Price Aluminum Fix Windows Frame for House Windproof Heat Insulation Sliding Windows
Negotiable
30 Square Meters
(MOQ)
Premium Noise Cancelling Sliding Window with Rubber Seal Insulation
US$
59.00
-
129.00
1 Square Meter
(MOQ)
Soundproof Double Glazing Windows Thermal Insulation Sound-Proof Aluminium Casement Window for House
US$
59.00
-
129.00
1 Square Meter
(MOQ)
1/4
Beijing Satisfactory Navigation Curtain Wall Decoration Engineering Co., Ltd.
16 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Low Maintenance Sliding Window with Black Finish and Quiet Insulation
US$
110.00
-
150.00
10 Square Meters
(MOQ)
Hot Selling Commercial Building Soundproof Thermal Insulation Aluminum Casement Window
US$
102.00
-
126.00
10 Square Meters
(MOQ)
Custom Modern Style Double Glazed Thermal Insulation Aluminum Casement Windows with Mosquito Nets
US$
102.00
-
126.00
10 Square Meters
(MOQ)
Triple Glazed Superior Insulation Sliding Window for Harsh Winter Climate Zones
US$
110.00
-
150.00
10 Square Meters
(MOQ)
1/4
Foshan Wanjia Window and Door Co., Ltd.
14 yrs
·
5.0
·
Manufacturer/Factory & Trading Company
Send Inquiry
Stylish Aluminum Casement Windows for Superior Sound Insulation
US$
99.00
-
148.00
2 Square Meters
(MOQ)
Robust Glass Aluminum Casement Window with Advanced Insulation Capabilities
US$
71.40
-
88.00
2 Square Meters
(MOQ)
Hot Insulation Soundproof Casement Window UPVC Vinyl Double Tempered Glass Window
US$
44.70
-
64.00
2 Square Meters
(MOQ)
Wanjia Commercial Heat Insulation Sound Proof Vinyl PVC Sliding Window
US$
30.00
-
45.00
10 square meters
(MOQ)
1/4
ZYF International Commercial (Suzhou) Co., Ltd.
2 yrs
·
Manufacturer/Factory
Send Inquiry
Premium 988 Series Aluminium Sliding Window for Ultimate Insulation
US$
55.00
100 Square Meters
(MOQ)
Sound Insulation Premium Series Inward Opening Aluminum Apartment System Window
US$
200.00
-
300.00
10 Square Meters
(MOQ)
Sound Insulation Passive Metal Aluminum High-End Villa System Window for Low Rise
US$
200.00
-
300.00
10 Square Meters
(MOQ)
Ntgreens Series Aluminum Metal Sliding Double Opening System Window
US$
200.00
-
300.00
10 Square Meters
(MOQ)
1/4
Foshan Rolay Safety Window and Door Co.,Ltd
5 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Rolay Aluminium Window Awning Window Thermal Insulation Child-Safe Soundproof Dustproof Tempered Glass Window Casement Window for School Buildings and Developer
US$
80.00
-
150.00
30 Square Meters
(MOQ)
China Sizes Easy Cleaning Energy Saving Thermal Insulation Corrosion Resistant Custom Window
US$
150.00
-
200.00
50 Square Meters
(MOQ)
China Heat Insulation Dust-Proof Customized Aluminum Sliding Door Casement Drifting Window
US$
99.00
-
180.00
30 Square Meters
(MOQ)
Customized Plastic Spacer Rubber Seal UV Protection Film Sound Insulation Energy Window
US$
250.00
-
350.00
30 Square Meters
(MOQ)
1/4
Chengdu Shufeng Doors and Windows Co., Ltd.
Send Inquiry
4. Professional Manufacturer Direct Sales Building Premium European Style Thermal Insulation Aluminium Aluminum Alloy Double Tempered Glass Sliding Window
US$
70.00
-
80.00
10 Square Meters
(MOQ)
2. Wholesale Balcony Window New Design Aluminium Aluminum Alloy Casement Security Double Tempered Glass Window Price Sound Insulation for Kitchen Bathroom
US$
80.00
-
95.00
10 Square Meters
(MOQ)
1. Customized Aluminum Windows Aluminium Alloy Tempered Kitchen Bedroom Double Glazed Glass Window Price Sound Insulation Casement Security Modern House Design
US$
85.00
-
100.00
10 Square Meters
(MOQ)
7. China Suppliers Aluminum Aluminium Alloy Different Types of Sliding Security Glass Window Sound Insulation for Residential Living
US$
100.00
-
120.00
10 Square Meters
(MOQ)
1/4
Leawod Windows & Doors Group Co., Ltd
18 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Energy Saving Thermally Broken Aluminum Aluminium Powder Coating Soundproof Heat Insulation Casement Window for Home Hotel Hospital with Flyscreen
US$
370.00
-
403.00
2 Square Meters
(MOQ)
High-End Soundproof Heat Insulation Wood Clad Aluminum Aluminium Metal Wooden Composite Casement Window with Double Tempered Glass for Home Villa Hotel
US$
359.00
-
399.00
2 Square Meters
(MOQ)
Factory Wholesale Price Wood Soundproof Heat Insulation Casement Window for Building Project
US$
359.00
-
399.00
2 Square Meters
(MOQ)
Factory Good Quality Metal Window Insulation Aluminum Glass Window for Bedroom
US$
292.00
-
318.00
2 Square Meters
(MOQ)
1/4
Zhejiang Deyans Window Co., Ltd.
11 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Aluminum Window Aluminum Casement Window Anti-Mosquito Heat Insulation and Sound Insulation Window Installation
US$
152.00
2 square miles
(MOQ)
Aluminum System Window Insulation Aluminum Window Villa Balcony Custom
US$
78.00
2 square miles
(MOQ)
Modern Safety Double Glazed Tilt and Turn Aluminum Casement Windows Sound Insulation
US$
95.00
-
100.00
10 square meters
(MOQ)
Custom Modern Aluminum-Clad Wood Special-Shaped Windows Solid Woodwindows with Round Carving Pattern Sound Insulation
US$
70.00
-
85.00
2 square meters
(MOQ)
1/4
Hebei Penjoy Windows Doors Co., Ltd
5 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Penjoy Aluminium Tilt and Turn Window Double Glazed Window Insulation Glass
US$
100.00
-
179.00
1 Square Meter
(MOQ)
Aluminum-Clad Wood Soundproof Thermal Insulation Hinged Wood Windows for House
US$
250.00
-
364.00
2 Square Meters
(MOQ)
Energy Efficiency Thermal Insulation Soundproofing UPVC Tilt and Turn Window for Residential Buildings
US$
123.00
-
143.00
1 Square Meter
(MOQ)
Penjoy Modern Design Thermal Insulation Custom Solid Wood Tilt and Turn Windows
US$
164.00
-
245.00
1 Square Meter
(MOQ)
1/4
Beijing Desland Windows & Doors Co., Ltd.
15 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Good Thermal Insulation Sound Insulation High Protective Properties Aluminum Clad Wooden Window Shutter Window Casement Window
US$
150.00
-
200.00
50 Square Meters
(MOQ)
Mss-68 Series Solid Wood Arched Windows, Thermal Insulation Casement Windows
US$
179.00
-
239.00
50 Square Meters
(MOQ)
Msd-90 Series Thermal Break Soundproof Waterproof Aluminium Window Factory Price Customizable
US$
59.00
-
99.00
50 Square Meters
(MOQ)
High-Quality Aluminum-Clad Wooden Windows and Doors for Sale
US$
150.00
-
200.00
50 Square Meters
(MOQ)
1/4
Guangdong Sinpolo Home Furnishings Group Co., Ltd.
5 yrs
·
Manufacturer/Factory
Send Inquiry
Thermal Break Tilt and Turn Window with Screen Aluminium Window Heat Insulation
US$
100.00
1 Square Meter
(MOQ)
Durable Aluminum Window System with Superior Heat Insulation
US$
101.90
-
123.90
2 Square Meters
(MOQ)
Premium Thermal Break Aluminium Window with Screen for Heat Insulation
US$
270.00
1 Square Meter
(MOQ)
Heat Insulation Double Glazing Exterial Glass Door Aluminum Picture Window for Coastal Area
US$
199.00
-
399.00
50 Square Meters
(MOQ)
1/4
Jinhua Xinfu Glass Co., Ltd.
Send Inquiry
Soundproof, Heat Insulation Aluminum Alloy Toughened Glass Casement Windows
US$
128.00
-
135.00
5 Square Meters
(MOQ)
Low-E Double-Glazed Windows with Outward and Inward Opening Provide Good Sound Insulation
US$
55.00
-
75.00
100 Square Meters
(MOQ)
Aluminum Alloy Tempered Glass Casement Window Sound and Heat Insulation
US$
128.00
-
135.00
5 Square Meters
(MOQ)
Aluminum Alloy Doors and Windows Sound and Heat Insulation
US$
128.00
-
135.00
5 Square Meters
(MOQ)
1/4
Hanzhong Xinda Decoration Industry Co., Ltd.
19 yrs
·
5.0
·
Manufacturer/Factory & Trading Company
Send Inquiry
Heat Insulation Windproof Aluminium Double and Triple Tempered Glass Sliding Windows
US$
37.25
-
68.46
2 Square Meters
(MOQ)
Weather-Resistant Metal Window with PVC Insulation for Comfort
US$
38.00
-
68.00
2 Pieces
(MOQ)
Durable Metal Window with Enhanced Insulation for Energy Efficiency
US$
49.00
-
91.00
2 Square Meters
(MOQ)
Aluminum Casement Windows Thermal Insulation Glass
US$
45.55
-
72.90
2 Square Meters
(MOQ)
1/4
Foshan Kesenbao Doors and Windows Co., Ltd.
12 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Excellent Waterproof Double Glazed Energy Heat Insulation Aluminium Awning Window
US$
50.00
-
90.00
3 Square Meters
(MOQ)
Aluminum Window Sound Insulation Casement Window Villa Balcony
US$
50.00
-
90.00
3 Square Meters
(MOQ)
Luxury Burglar Proof Glass Thermal Insulation Aluminum Awning Window
US$
50.00
-
90.00
3 Square Meters
(MOQ)
New Arrvial Sound Insulation PVC 2 Panels Aluminum Casement Window
US$
50.00
-
90.00
3 Square Meters
(MOQ)
1/4
Guangzhou Topbright Building Materials Co.,Ltd
Send Inquiry
House Insulation Windows Modern Design Double Glazed High Impact Casement Aluminum Windows
US$
85.00
-
145.00
2 Pieces
(MOQ)
Factory Price Custom Double Insulation Fixed Window Pictures Windows
US$
80.00
-
125.00
2 Square Meters
(MOQ)
New Technology Fixed Window Pictures Windows Double Insulation for House
US$
80.00
-
125.00
2 Square Meters
(MOQ)
White Heat Insulation Aluminum Casement Window
US$
90.00
1 Piece
(MOQ)
1/4
Guangzhou Guofan Aluminum Co., Ltd
Manufacturer/Factory & Trading Company
Send Inquiry
Custom Made Thermal Break Sound Insulation Aluminum Casement Windows\Sliding Windows\Sliding Doors\ Folding Doors
US$
3,500.00
-
4,000.00
1 Ton
(MOQ)
Premium Customizable Soundproof Aluminum Sliding Windows for Insulation
US$
3,500.00
-
4,000.00
1 Ton
(MOQ)
Energy-Efficient Aluminum Sliding Windows with Thermal Insulation Features
US$
3,500.00
-
4,000.00
1 Ton
(MOQ)
Premium Aluminum Sliding Window with High-End Thermal Insulation Technology
US$
3,500.00
-
4,000.00
1 Ton
(MOQ)
1/4
Shengze Industry Limited
5.0
Send Inquiry
Warm Stylish Casement High-Quality Thermal Insulation Impact-Resistant Aluminum Glass Window
US$
49.00
-
98.00
1 Square Meter
(MOQ)
Aluminum Thermal Insulation Tile Turn Frame Sash Modern Stalinite Casement Window
US$
39.00
-
99.00
1 Square Meter
(MOQ)
Aluminum Anti-Theft Thermal Insulation Screen Double Glaze Tilt Turn UPVC Window
US$
50.00
-
100.00
1 Piece
(MOQ)
Indoor Sound Insulation Double Glazed Anti-Theft with Different Kinds of Window
US$
50.00
-
100.00
1 Piece
(MOQ)
1/4
Gileed Industry Co., Ltd.
5.0
Send Inquiry
Multi-Cavity Soundproof Aluminum Casement Window Ultra Wide Insulation Strips
US$
80.00
-
130.00
10 Pieces
(MOQ)
Hot Sale Aluminum Heat Insulation Casement Window for Sale
US$
80.00
-
130.00
10 Pieces
(MOQ)
Thermal Insulation Swing Opening Window Double Tempered Glass Tilt&Turn Aluminum Window
US$
80.00
-
120.00
10 Pieces
(MOQ)
Hot Sales Double Tempered Glass Aluminium Alloy Insulation Arc Windows
US$
80.00
-
130.00
10 Pieces
(MOQ)
1/4
Beijing Bright View Windows and Glass Co., Ltd.
5.0
Send Inquiry
Aluminum Window Frame Energy-Efficient Inward Opening Tilt-and-Turn Windows/Windows Factory/Soundproof Aluminum Window/Heat Insulation Window
US$
40.00
-
89.00
2 Square Meters
(MOQ)
Australian Standard Commercial Insulation Soundproof Folding Windows Balcony Aluminium Bi Fold Windows Folding Windows
US$
110.00
-
125.00
10 Square Meters
(MOQ)
High Performance Aluminum Alloy Casement Window with Thermal Insulation Passive Window
US$
40.00
-
89.00
2 Square Meters
(MOQ)
OEM Service Windproof Thermal Insulation Folding Balcony Window Horizontal Folding Windows Aluminium Bifold Window
US$
110.00
-
125.00
10 Square Meters
(MOQ)
1/4
Foshan Multishades Group Co., Limited
Send Inquiry
Multishades OEM Aluminum Vertical Bi Folding Aluminium Metal Window Narrow Frame Low U Value Thermal Insulation House Commercial Villa
US$
80.00
-
88.00
1 Square Meter
(MOQ)
Thermal Insulation Multi Point Locking Tilt and Turn Window Multishades for High Rise Business Centers
US$
57.89
-
103.36
1 Piece
(MOQ)
Multishades Ultra-Narrow American Aluminum Folding Windows High Transmittance Nashville Commercial Frosted Glass Wholesale Thermal Insulation
US$
136.68
-
210.65
1 Piece
(MOQ)
Multishades Aluminum Casement Sliding Aluminium Metal Window Hurricane Glass Soundproof Heat Insulation Residential Commercial Villa
US$
61.00
-
67.00
1 Square Meter
(MOQ)
1/4
Xiamen KDSBuilding Material Co., Ltd.
15 yrs
·
Trading Company
Send Inquiry
American Resistant Nfrc Insulation Approved Vinyl Double Hung Customized Size PVC UPVC Sliding Windows
US$
30.00
-
150.00
10 Square Meters
(MOQ)
French Style Safe Grids Black Frame Heat Insulation Aluminum Windows for Houses
US$
70.00
-
110.00
2 square meters
(MOQ)
Kdsbuilding Sound Insulation Retractable Fly Screen Hurricane Impact Aluminum Frame Casement Others Windows
US$
30.00
-
150.00
10 Square Meters
(MOQ)
Sound Insulation Retractable Fly Screen Hurricane Impact Aluminum Frame Casement Others Windows
US$
30.00
-
150.00
10 Square Meters
(MOQ)
1/4
Foshan Hanse Industrial Co., Ltd.
Send Inquiry
Aluminum Alloy Sound Insulation and Heat Insulation Villa Balcony Room Door and Window Hollow Glass Sliding Window
US$
100.00
-
120.00
2 Square Meters
(MOQ)
Energy Saving Design Interior Aluminum Window Hurricane Impact Window Waterproof Sound Insulation Glass Casement Windows
US$
100.00
-
120.00
2 Square Meters
(MOQ)
Customized Design Casement Windows Burglar Proof Anti-Explosion Heat Insulation Sound Insulation Aluminum Window for Villa
US$
100.00
-
120.00
2 Square Meters
(MOQ)
Foshan Top Quality Double Layer Glass Argon Gas Bi-Fold Window Aluminum Thermal Insulation Glass Windows for Villa and Hotel
US$
100.00
-
120.00
2 Square Meters
(MOQ)
1/4
Sichuan Cylomon International Trade Co., Ltd
5.0
Send Inquiry
Modern Customdouble Glazed Toughened Glass for Insulation Rain Wind Resistance Aluminium Casement Window
US$
91.99
-
142.99
100 Square Meters
(MOQ)
Latest Customdouble Glazed Toughened Glass for Insulation Wind Resistance Aluminium Casement Window
US$
91.99
-
142.99
100 Square Meters
(MOQ)
Chinese Custom Double-Glazed Tempered Glass for Insulation Rain Wind Resistance Aluminum Casement Window
US$
91.99
-
142.99
100 Square Meters
(MOQ)
Customdouble Nova Toughened Glass for Insulation Rain Wind Resistance Aluminium Casement Window
US$
91.99
-
142.99
100 Square Meters
(MOQ)
1/4
Foshan Xingji Pilot Metal Products Co., Ltd.
3 yrs
·
5.0
·
Manufacturer/Factory & Trading Company
Send Inquiry
Sound Proof silent Aluminium Casement Window Customized Heat Insulation Tilt & Turn Aluminum Window with Stainless Steel304 Mosquito Net Window
US$
125.00
-
225.00
20 Square Meters
(MOQ)
Wood Grain Sound Insulation Aluminum Sliding Window
US$
89.00
-
115.00
20 Square Meters
(MOQ)
Electric Sound Insulation Aluminum Thermal Break Fenetre a Charniere Casement Window
US$
158.00
-
180.00
20 Square Meters
(MOQ)
Alloy Heat Insulation N/M Customization and Doors Aluminum Glazing Windows
US$
55.00
-
72.00
20 Square Meters
(MOQ)
1/4
Suzhou TRYBA Building Materials Technology Co., Ltd.
Manufacturer/Factory & Trading Company
Send Inquiry
Double Triple Glazed Low-E Tempered Glass Soundproof Waterproof Insulation Thermally Broken Aluminum Top Hung Awning Windows for Residential Commercial Hotel
US$
70.00
-
128.00
1 Square Meter
(MOQ)
Power Coated 65mm Aluminum Frame Folding Window with Insulation Strip
US$
70.00
-
128.00
1 Square Meter
(MOQ)
Double Glass Low-E Heat Insulation Glassaluminum Alloy Casement Window
US$
70.00
-
128.00
1 Square Meter
(MOQ)
Hurricane-Proof Aluminum Sliding Windows with PA66+GF25 Insulation Strip
US$
70.00
-
128.00
1 Square Meter
(MOQ)
1/4
Dechaab International Building and Housing Co., Ltd.
Send Inquiry
Heat Insulation Aluminum Shutter/Louver Double Glass Mosquito Net American Window Thermal Break Sliding Windows
US$
60.00
-
175.00
1 Square Meter
(MOQ)
Competitive Price Heat Insulation Aluminium Casement Window
US$
65.00
-
90.00
1 Square Meter
(MOQ)
Sample Provided Luxury Skylight Window with Heat Insulation
US$
60.00
-
350.00
1 Square Meter
(MOQ)
Heat Insulation Sliding Windows and Doors with Customized Color
US$
60.00
-
175.00
1 Square Meter
(MOQ)
1/4
Guangzhou Wintong Aluminium Products Co., Ltd.
17 yrs
·
Manufacturer/Factory & Trading Company
Send Inquiry
Guangdong Thermal Break Heat Insulation Double Glazed Aluminum French Window Models Profile Casement Window
US$
60.00
-
90.00
10 Square Meters
(MOQ)
New Design Thermal Break Heat Insulation Aluminum Window Aluminium French Window Casement Glass Window
US$
60.00
-
90.00
10 Square Meters
(MOQ)
Aluminium Windows Double Glazed Sliding Window Door Window Hardware Heat Insulation Impact Window
US$
100.00
-
180.00
1 Square Meter
(MOQ)
Guangdong Manufacture Thermal Break Heat Insulation Aluminium French Window Casement Window Grill Design Glass Window Home Decoration
US$
60.00
-
250.00
10 Square Meters
(MOQ)
1/4
Qingdao Donglai International Trade Co., Ltd.
Send Inquiry
Modern Aluminum Alloy Double Glass Triple Glazed Sound Insulation Windproof Anti-Theft Hand-Cranked Awning Window/Casement for House
US$
68.00
-
125.00
20 Square Meters
(MOQ)
Black Customized Africa Hotel Project Use Aluminium Frame Thermal Break Heat Insulation Swing Window Double Glass Louver Manuel Open Sliding Window
US$
56.00
-
125.00
20 Square Meters
(MOQ)
Robust Thermal Insulation and Waterproofing Against Corrosion Double Glazed Arched Push up Casement Caravan RV Sliding Balcony Wholesale Aluminum Alloy Window
US$
56.00
-
125.00
20 Pieces
(MOQ)
Black Aluminum Alloy Customized Sound Insulation and Heat Insulation Villa Balcony Room Door and Window Hollow Glass Sliding Window
US$
56.00
-
125.00
20 Square Meters
(MOQ)
1/4
1
123
Hot Products
Insulation Material
China Window
Sliding Window
Aluminum Window
Windows And Doors
PVC Window
Plastic Window
Aluminium Alloy Window
Related Manufacturers & Supplier
Aluminium Window Factories
UPVC Window Factories
Heat Insulation Window Factories
Sound Insulation Window Factories
Thermal Insulation Windows Manufacturers
Wood Window Manufacturers
Wooden Window Manufacturers
Casement Window Manufacturers