... 2.surface prominent 3.diameter 100mm,thick2.5mm 4.for granite,marble,concrete Diamond Floor Polishing Pads Brief Introduction ... Super thick diamond concrete floor grinding pads are used for marble , granite and concrete floor grinding and polishing. ... Step 6: #1500, #3000 for Final polishing Step 7: BUFF for Buffing Specification: Item No.DiameterThickness GritInchmmmm100mm4"801050#,100#,200#,400 ...