double sphere GJQ-SS flexible rubber joint standard: JIS,BT,ANSI, Material: NR, NBR,EPDM,etc Flange: Q235,galvanised iron. ... ,NBR,SBR,EPDM,Nylon Cord Fabric ,etcStandard: JIS,GB,ANSI,BT,etcDiameter Size: DN20--6000mm.Usage:pipe inside media with: water ...