This Clean Bite Crushed Glass Blast Media is the crown jewel of the abrasive blasting industry. The medium grade 40 x 80 grit premium glass abrasive efficiently cleans steel, aluminum, wood, concrete, stone and fiberglass, leaving a smoother, brighter finish. 50-lb. bag. Weight lbs. 50, Grit 40 x 80, Grade Medium, Material Type Glass, Recyclable Yes. Crushed glass provides better dust control, making it a much cleaner choice than coal slag Contains no crystalline silica, so your work environment stays safer Made from 100 recycled material Model Number: MEDIUM-50. Size: Medium. Age Group: Adult.