Check the listing for details. Dental Matrix Band Bicuspids/Tall Molar/Molar with Extensions Refill Matrices. Condition: New. Listed at 6.64 USD. Features: 1.Designed with hole protrusions, convenient to clamp, place and take out the formed piece 2.Form the adduction of the adjacent edge ridge 3.Conforms to the subgingival extension of the Tooth neck 4.Larger curvature can wrap and fit the tooth more stably 5.Restore tooth shape and Anatomical shape 6. The resin material has good elasticity and resilience, does not deform (note that the elastic limit cannot be exceeded). 7.Special reinforced matirial ensures the appropriate strength and elasticity; 8.Two rings: one is used for normal crowns, and the other is used for crowns with low crowns, deciduous crowns or irregularly arranged crowns. 9.Good elasticity and toughness, good clamping force, invariability after repeated use. 10.Close fit and good retention 11.Autoclavable Quantity: 50pcs/box Model: Bicuspids 4.5mm Molar 5.2mm Molar with extensions 6.4mm Tall molar 6.4mm FDA Statement: The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, do not bid on this item unless you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item.