... one of largest manufacturer and exporter of steel shots and steel grits in China. Cooperating with Material Science and Engineering College of Shandong University ... and guided by experts and professors of metal abrasive field,the company ... .4mm,0.5mm,1.6mm,0.8mm,1.0mm Copper and Aluminum shot ,0.3, 0.4, 0.5, 0.6 ...