quick coupling Specialized in concrete pump parts and spare parts,like delivery pipe,elbow,coupling,fitting schwing,PM, quick couplingThis is the brief ... delivery pipe, elbow, reducer, (coupling)clamp , male and female flange ,rubber hose,cleaning ball,wear plate etc. Welcome to contact ... all size as to your request 5.sponge cleaning ball Material:natural rubber Size:DN100,DN125,DN150,according to ...