concrete pump pipe high wear-resisting, inner-harden, long service life, high security, highly pressurized,widely used concrete pump pipepipe line(wear-resistant seamless or welded tube) material:45Mn2,high quality alloy steel pipe,st52,20#steel,etcsize:DN 125mm or DN 150mmWall thickness:4.1-7.1mmlength:3meters is standard length,other length as to your requeirement.