Mega V Contact Matrix System - Clinical Kit: 4 Mega Rings, 100 Small Thin Flex Matrices, 100 Large Thin Flex Matrices. Designed to achieve consistently tight, reliable contacts. Helps ease and simplify wedge placement with an open "V" design, while converging tines prevent pop-offs. Its larger hoop diameter provides easy access and the inclined angle allows for stacking of multiple rings. Unique alloy construction. Fully autoclavable.