Glass granules used as abrasives in blasting and tumbling machines; Ground shells used as abrasives in blasting and tumbling machines; Metal granules used as abrasives in blasting tumbling machines; Ceramic granules used as abrasives in blasting and tumbling machines; Resin granules used as abrasives in blasting tumbling machines; Aluminum Oxide granules used as abrasives in blasting and tumbling machines; Silicon Carbide granules used as abrasives in blasting and tumbling machines; Garnet gr...