... the parts. Available in a wide range of sizes, glass beads are primarily used in blasting cabinets for honing, polishing, blending ... the size of perforations or holes through which the glass beads must pass when screen separating parts from media after use ... or bagspolishing media-Ceramic mediaCeramic polishing media, plastic media, grind beads. Ceramic ball are made of carborundum, which is mainly used ...