Packs of 2 IPR Tips2 IPR Tips: Red: 0. 5 mm thick, Abrasive on Both Sides Green: 0. 4 mm thick, Abrasive on Both Sides Yellow: 0. 3 mm thick, Abrasive on Both Sides Purple: 0. 25 mm thick, Abrasive on Left Side Purple: 0. 25 mm thick, Abrasive on Right Side White: 0. 2 mm thick, Abrasive on Both Sides Black: 0. 1 mm thick, Abrasive on Both Sides IPR tips have a grit of 50 microns, except 0. 2 mm (40 microns) and 0. 1 mm (15 microns). Color coding corresponds to the