... / ISO9001. Newest model+best price+high quality. Professional service. DN1.5"- DN72". Features:This product is EPDM rubber.1:EPDM ... temperature steam resistant.4:No permeability to the gas.5:Suitable temperature:-50oC~150 oC6:We have got the ... WRAS and ISO9001 Certificate.7:Size: 1.5 "- 72". Materials:Rubber Seat Material: NBR, EPDM, NR, ... you the best advice. rubber valve seat 1.5" -72"