... products. They are flexible rubber joints, reduced rubber joints, rubber elbows, fan coil joint, sewage check valve rubber, rubber filter, rubber compensator air flue compensator, flexible ... . Material: NO.NAMEMaterial1Inner and outer rubberNR,EPDM,NBR,SI2Key frameNylon Core fabric3Pressurized ringSteel Wire Strand4FlangeQ235,A3Technology Condition: SizeIIIIIIWorking Pressure MPa(Kgf ...