... -15- No.of plys : one ply double plies ,three plies ,four plies .- material: stainless steel ss304,ss321,ss316L, phosphor bronze, CuSn4, CuSn6 ... the Yixing City to design and manufacture stainless steel welding pipe, corrugated pipe, metal hose, compensator, expansion joint and automobile muffler. ... Best ServiceIf you have any question, please contact us! Stainless steel flexible component with flange