1)size:407pcs purchase o-ring service kit(NBR 70 SHORE) 2) Material specification: NBR, HNBR, EP/ ... EPDM SILICON 1)size:407pcs purchase o-ring service kit(NBR 70 SHORE)2) Material specification: NBR, HNBR, EP ... .213.5310-22650.393.5310 NBR 407pcs (inch) o-ring service kit