Purchase Qty. Reference FOB Price
100-499 Pieces US$1.20
500-999 Pieces US$0.86
1,000+ Pieces US$0.56
Product Description
Spiral Duct Regulating Damper RDD 1.Our regulating damper is made of galvanized steel,which is widely used in ventilation area. 2.The air flow through the damper is controlled by the opening angle of the blade. 3.The angle of blade can be adjusted by a handle manually. 4.For the purpose of ...