- 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 arch wires a crisper response as they move between their soft state and stiff state. - Size: .018. - Type: Upper. **For further product information , please contact Chat Support**