... L105For Polishing Marble Slab/Tile on Automatic Polishing Machines ( 12 head, 16 heads, 20 heads more or less)Good Polishing ... 24#, 36#, 46#, 60#, 80#, 120#, 180#, 220#, 240#, 280#, 320#, 400#, 600#, 800#, 1200#, Extra -5 and Cleaner Recommend Grit ... Solution for 16 Head Polishing MachinePolishing Head #1- #8: 60#, 120#, 120#, 180#, 180#, 240#, 320#, 320#, Polishing Head #9- #16:400#, ...