- Strength Category: super-elastic. - Maxillary/Mandibular: Mandibular. - Arch form: American Style ≙ Damon Style*. - ø: 0.45 mm / 18. - Af: 30 °C/86 °F. - Material: thermo-active nickel titanium. - Rev.2 %. **For further product information, please contact chat support**