159067 Grit Size: 8500 (Black) Features: -Flexible Dry Polishing Discs.-Flexible, Hook and Loop backed discs for dry polishing granite and marble.-Max 3700 RPM.-Diameter: 4". Color/Finish: -Disc backs are color-coded for easy grit size identification.-Item # 159060 - Grit: 50, Color: Yellow / Green.-Item # 159061 - Grit: 100, Color: Red.-Item # 159062 - Grit: 200, Color: Yellow.-Item # 159063 - Grit: 400, Color: Light Blue.-Item # 159064 - Grit: 800, Color: Green.-Item # 159065 - Grit: 1500, Color: Orange.-Item # 159066 - Grit: 3000, Color: Light Pink.-Item # 159067 - Grit: Buff (8500), Color: Black.-Item # 159068 - Grit: Buff (8500), Color: White. Dimensions: -Weight: 1 lbs.