... parts and spare parts,like delivery pipe,elbow,coupling,fitting schwing,PM, quick couplingThis is the brief ... ,CIFA,etc),which include delivery pipe, elbow, reducer, (coupling)clamp , male and female flange ,rubber hose,cleaning ball ... , 60,45,30,15 3. concrete pump coupling/clampmaterial:Hi-Mn13,20#steel,etcsize:from 2 ... 15m, 18m, 20m, 21m, 24m, 28m hydraulic concrete spreader and manual spreader.