... PM , Sany, Zoomlion,CIFA,etc),which include delivery pipe, elbow, reducer, (coupling)clamp , male and female flange ,rubber hose,cleaning ball,wear ... is standard length,other length as to your requeirement.2. elbow/bend and reducer elbowmaterial:Hi-Mn13,20#steel,st52,etcsize ... ,R315,etc)degree:90, 60,45,30,153. concrete pump coupling/clampmaterial:Hi-Mn13,20#steel,etcsize:from 2 to 6inch ...