GC, Metal Strips Coarse Blue #300 12/Pack (4 mm) C-Width Finishing StripGC NEW METAL STRIPS are ideal for trimming and finishing interproximal surfaces such as: composites, glass ionomers or metal restorations. The fact that they will not stretch or break is what makes them unique from other brands. The excellent wear resistancy and superior abrasive bonding allow wet finishing, which assures long lasting and repeated use. The GC NEW METAL STRIPS are sterilizable and autoclavable.