They are produced combining two different types of grains. Properties: - It allows excellent results in polishing. - Flexible and easy to use. - White : Extra Fine for polishing. - Yellow : Fine for finishing. - Green : Medium for contouring. - Blue : Coarse for gross reduction. Kit contains : - 80 Discs. - 1 Disc holder. - 75 Strips in a plastic box. **For further product information, please contact Chat Support**