Model NO.: 10*0.75, 10*1, 8*1.25, 8*1.5, 4*10, 5*10, 6*10 Black: Abrasive Block Manufacturing Arts: Sinter Usage: Diamond Polishing Trademark: 3u Specification: 10*0.75, 10*1, 8*1.25, 8*1.5, 4*10, 5*10, 6*10