Direct manufacturers of high-quality FKMO ring seals 1. ... .Any HOT SELL o rings1)We have kinds of material : NBR,HNBR,EPDM,SILICONE,VITON,NR, ... for more than 20 years,The main production silicone rubber products, rubber products (NBR, EPDM, SBR, etc.) which sell well ... :1.The permeability of small2.Not resistant to low temperature3.Poor radiation resistance Direct manufacturers of high-quality viton ...