- Used for sandblasting units/micro blasters, works efficiently when paired with Renfert sandblaster units. - Cobra 50 micron sandblasting material. - Color - white. 12.5 kg canister (28 lbs). - This abrasive contains one of the hardest - materials: aluminum oxide (Al2O3). Extremely sharp edged. - Low to very high abrasive effect dependent on size. - Extremely pure - approx. 99.7% Al2O3.