Tofflemire N. 3 Contoured [0.05mm (0.002in)] To provide and maintain shape for the restoration while the restorative material hardens. To confine the restorative material within the cavity preparation and pretermined surface.Package of 12 pcsFor Tofflemire Matrix Retainer 366180, 366185 FOR MOLARS AND PREMOLARS MATRIX NYSTROM X-NARROW mm0.05 - 12 pcs