rubber joint sphere Body: neoprene, EPDM,NBR Lining: chinlon cord fabrics Standard: ANSI, ... products (with Diameter from DN25mm-- 6000mm) have excellent comprehensive performances Sphere: neoprene,NB,NBR,SBR,EPDM,Nylon Cord Fabric ,etcName: flexible ... ,water,sea water,hot water,weak acid,etc. rubber joint sphere