... seamless or welded tube)material:45Mn2,high quality alloy steel pipe,st52,20#steel,etcsize:DN 125mm or DN 150mmWall thickness:4.1 ... your requeirement.2. elbow/bend and reducer elbowmaterial:Hi-Mn13,20#steel,st52,etcsize:DN 125mm or DN 150mm (R275,R225,R315 ... , 60,45,30,153. concrete pump coupling/clampmaterial:Hi-Mn13,20#steel,etcsize:from 2 to 6inch,DN125mm and DN 150mm is ...