8pcs, 2.35mm handpiece Acrylic Polishing kit: Simple and straight way to adjust Acrylic without the problem associated with pumice 1st Step:  F060 SC  L040SC:Initially remove and adjust 2nd Step:  U 12  U 12:Initial polish/Dark 3rd Step:  U 13  U 13:Medium polish/Green 4th Step:  U 16  U 16:Final polish/Yellow