One width and three colour-coded grit sizes Purple（Coarse） Green（Medium）Yellow（Fine） Size：50μm,30μm,20μm Width ：4mm Length：6m Purple--Shaping, Green--Pre-polishing, Yellow--Polishing The abrasive strips are made of flexible polyester and firmly coated with aluminium oxide particles. The strips can be used for smoothing and polishing the interproximal areas of a variety of dental filling materials. Essential and ideal for polishing resin restorations. Package：1 roll Mixed: 4 colors, 15pcs/color, 150mm/stick. 4mm wide. Total 9m long. Package: 60pcs/box Holder: Low: 27*12mm High: 30*16mm Package: 2pcs/box