1) EPDM flange gasket, full face type 2) EPDM square gasket 3) O Rubber ring 4) Rubber gasket for socket, push on type rubber seals 5) T type rubber ring of EPDM materials 6) Large diameter ductile iron pipe T shape rubber ring 7) Mechanical K-type rubber seals Body materialsï¼?are NR, EPDM, SBR, NBR,CR, Applicable standards: ISO4633-2002.ISO4685 Pt.1.