302 304 304L 316 316L 2mm 2.5 3 3.5 4 5 6 6.5 8 8.5 9 10 11 12 16 17 mm Stainless Steel Grinding Balls, Find Details and Price about Steel Ball and Perfume Miniaure Pumps from Taian Xinyuan Precision Steel Ball Manufacturing Co., Ltd.