- Opener: #17/12; R3-R1: #20/06. - Length: 25 mm. - Af-h wire tech. - Triangular cross section design. - Reserve more dentine. - Respect to the canal anatomy. - Suitable for curved canals. - Specialty for advanced tip process & avoid forming ledges. - Pack of 4 pcs. **For further product information, please contact Chat Support**