... in concrete pump parts and spare parts,like delivery pipe,elbow,coupling,fitting schwing,PM, pipe bendThis is the brief introduction ... and PM , Sany, Zoomlion,CIFA,etc),which include delivery pipe, elbow, reducer, (coupling)clamp , male and female flange ,rubber hose,cleaning ... is standard length,other length as to your requeirement. 2. elbow/bend and reducer elbowmaterial:Hi-Mn13,20#steel,st52,etcsize ...