25" x 60" Premium Ceramic Belts (Best for: Exotic Metals)Our premium ceramic material has an 80% ceramic 20% alumina blend with grinding aid, which is much higher than the standard 50 50 blend on most other ceramics. Best used for exotic metals but can be used anywhere you may need a very aggressive application. Y weight polyester backing Dry applications Choosing a Grit Coarse Grits (24 80): For heavy material removal, weld grinding, or shaping. Medium Grits (100 180): For blending, deburring, and