Excellent wire for initial leveling and aligning. Reacts to the heat in a patient's mouth and exerts a light, continuous force as it returns to its original shape. Made from an advanced nickel titanium resiliency which means they are measurably more resistant to permanent set (Deformation) while friction is minimized. The advanced thermal properties display a narrower transformation band from martensite to austenite which gives the archwires a crisper response as they move between their soft state and stiff state. - Size : .017 X .025 - Material : Niti. - Shape : Rectangular. - Arch : Upper. **For further product information, please contact Chat Support**