Purchase Qty. Reference FOB Price
100,000-499,999 Sets US$0.009
500,000-999,999 Sets US$0.007
1,000,000+ Sets US$0.005
Product Description
Product Description Breathing valve: In a humid or poorly ventilated or labor-intensive work environment, using a breathing valve can help you feel more comfortable when exhaling. The breathing valve on the mask will not have a certain impact on the protective effect. The protective effect of ...