Feature●Ceramic media is made of a ceramic binder and an aluminum oxide abrasive grit●For use in grinding and polishing of hard metal workpieces●Use on steel, stainless steel, titanium workpieces●Extremely versatile for deburring machined, cast iron or fabricated parts●Allows faster deburring and more aggressive removal of metal on a workpiece●Angle Cut is best used on concave surfaces and rounded areas of workpieces with holes.Description Raytech ceramic is the heaviest media and is also the fastest finisher. Bonded of the highest quality materials available, selected aluminum oxide abrasives produce constant quality. This durable, long-lasting media is extremely versatile for deburring machined, cast or fabricated parts. Density: 90 lbs/cu ft. Size: 3/8-inches by 7/8-inches.