The Composi-Tight 3D XR system has taken all the benefits of the original 3D system and built upon them. The tenacious grip, along with the enhanced Soft Face technology and Dynamic Tip Angle, makes the Composi-Tight 3D XR system the best choice for all Class II restorative procedures. Kit contains 1pc Composi-Tight 3D XR Ring, 2pcs Composi-Tight 3D Rings, 100pcs assorted Composi-Tight 3D Fusion Full Curve matrices, 100pcs assorted Composi-Tight 3D Fusion wedges and 1pc ring placement forceps.