●5 Pounds 80 to 120 Grit Black Aluminum Oxide Sand Blasting Abrasive Media. ●There are 2 jar sand blasting media in total. Each jar contains 2.5 pounds of sandblasting media. The sealed jar can be reused to prevent the sandblasting media from contacting the moisture in the air. ●High Hardness- Black aluminum oxide is a mineral with a hardness of 9 on the Mohs scale, our aluminum oxide blast media will clean & etch on all types of surfaces including glass, granite, marble, ceramic and steel for fast, effective rust removal. ●Long-Lasting - Aluminum oxide blast media wont break down as fast as glass blasting media and has a longer cycle life than most blast media. Lasts 10 times longer than silica and save your money. ●Eco-Friendly -We provide you sand blasting media with strict quality standards, no free silica, 100% recycled of the sand blaster sand for metal, can be used wet or dry. Non-reactant, won’t interfere with your coatings during surface prep.