... DISC GRAIN:BLACK SILICON CARBIDE,ALUMINUM OXIDE,ZINC-STEARATE COATED,ZIRCONIUM circular velcro disc1) Grain:black silicon carbide,aluminum oxide,zinc-stearate coated ... ,zirconium2) Coating density:close coated,half open coated3) Size:100mm,115mm,125mm,180mm4 ... 1hole,6 holes or according to customers requirement CIRCULAR VELCRO DISC GT009