... , likes viton , NBR, CR, etc x-ring, o-ring, square ring,,,etc for new sizes or new models ... required.hydraulic sealing items.backups , dowty seals, u seals,o rings, wipers, oil seals, piston seals, v packings, rod seals ... , wear rings, piston cups,,,,etc.O-Ring (NBR 72 Shore)O-Ring (NBR 88 Shore)O-Ring (FKM 80 Shore)O-Ring ( ... in different sizes.good quantity , better price. X-rings, o ring kit, square ...