These GC New Metal Strips are galvanized metal bands, coated with aluminum oxide particles, available in a 6mm width or in assorted widths depending on the grit. Their metal rigidity, greater than that of polyester strips, makes it easier to cut through tight contact points and pass through bulkier restorations. The range consists of 4 grits identifiable by color code, to be used in sequence for complete treatment of the proximal surface: No. 200 red for initial preparation, No. 300 blue for final preparation, No. 600 green for finishing, and No. 1000 yellow for final polishing. Sold in a box of 12, these strips suit any type of restoration (composite, amalgam, ceramic) requiring precise contouring and polishing of interdental surfaces.