Feature: Special reinforced matirial ensures the appropriate strength and elasticity For molars with regular crown,with short crown, deciduous teeth and other chanllenging areas This kit include four types of sectional matrix,two different specifications of resin clamping ring. Deliverying optional separation forces and buliding perfext contct each time Tight contacts,excellent retention and separating teeth without impaction Resin material has good elasticity and resilienceno deformation , can be autoclave The sectional matrix bands can be easily shaped and embedded between the teeth. Necessary parts for dental teeth filling treatment. The sectional matrix bands is made of steel material, durable and convenient to use. Sectional Matrix System contains: Sectional Matrix Bands:30pcs(#1 5pcs,#2 10pcs,#3 10pcs,#4 5pcs) Resin Clamping Ring-1pc Resin Separating Ring-1pc