Metal and Resin Hybrid Concrete floor polishing padsWith perfect combination of metal bond and resin bond ,make the grinding efficiency higher. Most smooth, and the life is more longer than normal resin pad. Specially for terrazzo floor.With velcro back. And velcro color can be changed as requested.More longer lifeUse with all concrete grinders or polishersOne set including 30 ,50 , 100, 200, 400grit.Available sizes: 3"Thickness:10mmWet Use.Item No.SizeGrit No.Velcro ColorThicknessC300070 3"/76mm30Orange 10mmC30007150GreyC300072100BlackC300073200 BlueC300074 400 Red