Medium Diameter Crushed Glass Blast Media, Blasting Abrasive Media (Extra Course) #50 Mesh - 559 to 254 Microns - 8.6 kg | 19 lbs. Recommended for applications where you want to remove rust and most coatings from the item's surface. Crushed glass has superior cutting power. Excellent for use on steel, aluminum, concrete, or wood. Gives you more product per pound due to lower bulk density. Crystalline Silica-Free, Environmentally Friendly, Made from Recycled Glass. Crushed Glass is inert, non-flammable, non-corrosive, and non-fribrogenic. Works with a blasting gun or in a blast cabinet.