O ring gasket Material NBR, NR, EPDM, FKM, SBR, Silicone, Neoprene or Custom Size According to the 2D or 3D technical drawing or samples Color transparent,black,any color Duro 30~80 Technics designed by 3D high accuracy, small error Finish diepressingMaterial:We use various kind of polymers like NBR, NR, EPDM, FKM, SBR, Silicone, Neoprene etc...