Premier X5 Sectional Matrix System Essential Kit, 1/Pk. Comprehensive solution for class 2 interproximal restorations. Contains: 25 - 3.5mm matrix, 25 - 4.5mm matrix, 25 - 5.5mm matrix, 25 - 6.5mm matrix, 25 - yellow small wedge, 25 - green medium wedge, 25 - blue large wedge, 10 - matrix ring universal. Strong, proprietary resin rings, reusable up to 5 autoclave cycles. Anatomically-shaped matrices, proper contouring, and tight contacts. Compatible with other systems' wedges and matrices.