Check the listing for details. Dental Sectional Matrix 3D Matrices Hole Protrusions Fits Ring 5.5mm. Condition: New. Listed at 16.56 USD. Dental Sectional Matrix System Hole Protrusions 3D Matrices Fits Garrison Matrix System This is selling 5.5MM, Medium Size. 50 pieces/Box 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; 9.Close fit and good retention 10.Autoclavable Available sizes: Fits Garrison Matrix System 1#3.5mm Extra Small 2#4.5mm Small 3#5.5mm Medium 4#6.5mm Large If you need assorted size,please message us.