Quartz Grits – Supreme Grade Grits 0.1 - 0.4mm Gritz 0.3 - 0.7 mm Gritz 0.6 - 1.2 mm Gritz 1.2 - 2.5 mm Gritz 2.5 - 4.0 mm Gritz 4.0 - 6.0 mm Gritz 5.0 - 8.0 mm Technical Specification SiO299.7% MinimumDensity2.66 gm/cm3Hardness6 – 7 Mohs