http://www.triodent.com/v3ringsyste...
The awardwinning V3 Sectional Matrix System has the widest indications for use of any sectional matrix system.
The system includes components that are all industry leaders, achieving perfect contacts and the best tooth anatomy. Those key components include the V3 Ring, V3 TabMatrices and WaveWedges the smarter tools to create better Class IIs.