please to quote for stainless steel ball, type 304 , grain size : 3- 5 mm, ( it is blend of 3,4,5, mm) used for polishing aluminum spare parts in vibrators contains polishing compound 请报不锈钢球,304材质,粒度(尺寸):3-5毫米,(3、4,5毫米混合)用于振动容器里抛光铝件 联系:396277228 注明:不锈钢球 谢谢