Fintrec Matrix Strips by Pulpdent are ultra thin and extra strong. These memory-free strips are made of annealed stainless steel matrix material for work with amalgam and self-cure composites. These strips are 0.001"/0.025mm thick on 20' rolls, while the Transparent Matrix Strips are 0.002"/0.05mm thick, on rolls 59' long. The transparent strips are light-permeable, being made of a polyester matrix material. Use these strips with light-cure or self-cure composites. Both strips are 8mm wide.