... . Item No.:diamond floor grinding head Diameter: Grit:#6, #16, #30, #50, #100, #200, #400.Thickness:10mmBack:Velcro, Terrco, Redi-lock ... condition:Both for dry and wet.Processing Object:Granite, marble, concrete etc.Feature1. For granite, marble concrete polishing & grinding.2. Total Coverage ... ,000SQ.Ft. Given 12 discs per cut, this is only less than 3 cents per sq.ft per cut. MOQ:No requirement ...