... abrasive with medium titania, blocky shape and high density. To get the kind of grains, we specially process the ... separate the magnetic material, and sieve the grains carefully to get a complete range of grit sizes. It is ... , 9.0 Mohs scaleMagnetic Material 0.0076%Grain Sizes Available (F):12, 14, 16, 20, 22, 24, 30, 36 ... ISO 8486-1 Brown Fused Aluminum Oxide F Grit for vitrified bonded grinding wheels.