... (with Diameter from DN25mm-- 6000mm) have excellent comprehensive performances Sphere: neoprene,NB,NBR,SBR,EPDM,Nylon Cord Fabric ,etcName: ... ,ANSI,BT,etcSize: DN20--6000mm.Usage:pipe inside media with: water,smoke,acid / alkali / sewage liquid,etc,Brand: BrightMarket: ... , Speciality reach to -30-250Applicable media:Air. Compressed air,water,sea water,hot water,weak acid,etc. rubber joint sphere