81 Pieces of 3 / 3 Inch (11 mm Thick) Floor Pad. Thickness Diamond Polishing Pad for granite marble concrete terrazzo. 9 Pieces X Grit 30 50 100. 200 400 800 1500 3000 6000. Description of the 11. Much aggressive to do mirror effect, -Velcro backed, can be attached to the floor polishing machines, -Used dry or wet. Designed for floor machines to polish, restore and maintain the concrete floor, terrazzo floor and granite floor.