Composi-Tight 3D Fusion Sectional Matrix System Kit, 1/Pk, FX-KFF-10When design and function come together, you get Fusion! The Composi Tight 3D Fusion sectional matrix system has been engineered to provide the ultimate solution to even the most difficult of Class II challenges. Whether youre restoring an entire quadrant, the distal of the canine, or a completely broken down MOL, Composi Tight 3D Fusion provides you with the materials to achieve predictable results. Tight contacts Guaranteed! Superior tooth separation