high pressure rubber hose Specialized in concrete pump parts and spare parts,like delivery pipe,elbow,coupling,fitting schwing high pressure rubber hoseThis is ... , reducer, (coupling)clamp , male and female flange ,rubber hose,cleaning ball,wear plate etc. Welcome to contact us for ... as follows; 1. pipe line(wear-resistant seamless or welded tube)material:45Mn2,high quality alloy steel pipe,st52,20# ...