1.pump parts 2.OD:60-320mm Thick 8-35mm 3.High density,zero defects,easy cutting Shaanxi Tongxin Continuous Cast Tube Tech Co.ltd, an exclusive manufacture in producing Continuous Cast Iron Hollow Bar which is.. A high quality alternative to castings due to:No porosity, slag, shrinkage or other typical casting defects Dense, fine-grained microstructure Thin wall tube Min. 7mm only No pattern or ...