There are discs of four diameters: 10, 12, 14 and 16 mm. Easy-to-use finishing and polishing system allows you to create high-luster restorations that offer lifelike esthetics. Discs are color coded to allow for easy identification of grit sequence. Flexible disc technology makes changing discs easier to save you time. Discs conform to the contours of the teeth for easier finishing and polishing. Extra thin discs allow for easier access to interproximal surfaces while offering a slightly stiffer disc.