-The .021x.027 Nitinol Heat Activated Finishing wire is designed for .022 slot brackets. -It optimizes the design features of the bracket by fully engaging it for better control of rotation and torque. -Being thermally activated makes this wire very flexible, allowing it to be easily inserted into the bracket slot, despite it's large size. -This wire is especially helpful for finishing cases with self ligating brackets. **For further product information, please contact Chat Support**