CNC technology, ensures the accuracy of slot size and more perfect radian. Smooth surface and low profile design, to improve the comfort of patients. Four-wing design, to satisfy different traction and ligation. New polishing technique results in minimizing surface roughness, and maximum patient comfort. - Roth. - Slot: 0.022. - Type: Upper & Lower with Hook on 3. **For further product information, please contact Chat Support**