100/pk Silicone Rubber Polishing Wheels Polishers for Dental Lab or Jewelry Rotary Tool 100 Dental Lab Grey Polishing Wheels They are specially designed for ceramic workpieces, mainly used for porcelain tooth surface/tooth crown/tooth slot/connecting points & edge of the workpieces fine finishing and polishing. Color: Black Granularity Grades: Coarse Great for Woodworking, Dental Laboratory, Jewelry & Crafts, Die & Mold Shops Diameter: 22mm RMP: 8,000 - 15,000