... Ptfe rubber etc MaterialSpecialty of Oil SealNBRMineral oil resistance, good abrasion resistance, Use wide if oil seal, but not used in ketone ... chemical Resistance,It's the best type of Oil Seal with Rubber performance balance in various RubberEPDMGood water ... regulations; 4, Require appropriate flexibility, can properly gets stuck, shaft sealing function; 5, Resist heat, the wear-resisting, strength, ...