Direct manufacturers of high-quality FKMO ring seals 1.Material- ... 3.Any HOT SELL o rings1)We have kinds of material : NBR,HNBR,EPDM,SILICONE,VITON,NR,FLS ... Jianzhong Rubber Products Co., Ltd. Dali Branch specializes in producing for more than 20 years,The main production ... :1.The permeability of small2.Not resistant to low temperature3.Poor radiation resistance Direct manufacturers of high-quality FKM ...