... 50 LB boxes or bagspolishing media-Ceramic mediaCeramic polishing media, plastic media, grind beads. Ceramic ball are made of carborundum, ... beadPlastic Media are made of high quality of abrasives and plastic resin, generally used for gentle processing of almost all materials, ... like aluminum, zinc, copper, brass, gold, and silver. Plastic media can provide high surface finish and widely used for ...