Available in 1 lb and 5 lb bulk sizes, Kingsley North’s 120/220 Silicon Carbide Grit is an ungraded mixture of split sizes to meet your abrasive needs. Kingsley North’s 120/220 silicon carbide grit is commonly used in Stage 2 of rock tumbling, providing a finer abrasive that prepares stones for pre-polish by smoothing out remaining imperfections.