... Supply fast,best price,good quality 3.Any HOT SELL o rings1)We have kinds of material : NBR,HNBR,EPDM,SILICONE,VITON, ... NR,FLS,FFPM,PU,PTFE etc.2) High temperature and acid- ... resistanceDefect:1.The permeability of small2.Not resistant to low temperature3.Poor radiation resistance Direct manufacturers of high-quality FKM o ring seals