Super Finishing Abrasive Stones is used for hand lapping, cylinder thinning, bearing precise grinding, diamond cutter amending and so on. Main materials are white corundum, brown corundum, chromium alumina, black silicon carbide, green silicon carbide etc.; grain size: 20# =--1200#. Besides, there are also all kinds of non-standard small abrasive sticks & fiber stone stick in the shape of triangle, square, semi-circle, column and so on.