1)Material:silica gel,NBR,EPDM,Teflon,Viton 2)Size:match valve valve Gasket(valve sealant,seals,sealing ring) Produtc name:valve Gasket(valve sealant,seals,sealing ring)Used in all kinds of valvesSize:match the valve sizeMaterial:silica gel,NBR,EPDM,Teflon,VitonColor:red,blue,black,white valve rubber silicone gasket