... , industry ect 3.good price 4.high purity quartz silica sand makerOur factory adopts the natural good quartz as raw material, it is broken ... , 40-70mesh, 100-200mesh, 270mesh, 325mesh, 400mesh, 500meshApplication:Silica Quartz is widely used in aerospace,electronic epoxy encapsulation, precision casting ... bag .Delivery Detail:wighin 25days after confirm the contractPictures : super purity quartz sand