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1/4” x 3/8” Ceramic Triangulars 2.7 kg | 6 lbs + Finishing Compound Efficient, long-life aluminum oxide in a hard ceramic bond for general purpose polishing, light deburring and smoothing of rough castings. This media is made up of 1/4” x 3/8” Triangulars Cuts and provides a high luster finish. Ceramic media works well on both soft and hard metals, aluminum to stainless steel. Choose the shape that best matches the contours of your part and a size that’s large enough not to lodge in recesses and holes.