... rubber seals x-ring kit, x ring , o ring, square ring,,etc for different rubber, likes viton , NBR, CR, etc x-ring, o-ring, square ring,,,etc for ... .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 ...