... 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 new sizes or new models, we also ... (FKM / NBR 95 Shore)Covered the most BUNA, FLUOROELASTOMER, SILICONE, EPR, NEOPRENE, TEFLON, POLYURETHANE, POLYMYTE MATERIALS.Only cooperate with ... quantity , better price. X-rings, o ring kit, square rings