- NiTi Closed Coil Spring is ideal for cuspid retraction and closing extraction space. - The low force, long acting properties of the Nickel-Titanium Closed Coil makes for an ideal force application when sliding one cuspid along an archwire activated a small amount. - Greater activation of the coils results in higher forces that can be applied to closing extraction spaces with sliding mechanics. - A major advantage is the long "range of activation" of nickel-titanium, allowing for extended appointment intervals, typically 8 weeks between reactivation. - Wire Size: .010 x .030. **For further product information, please contact Chat Support**