Check the listing for details. Dental Orthodontic Torquing Torque Spring Rectangular Anterior Teeth Wire S/M/L. Condition: New. Listed at 4.59 USD. Tooth Torque Spring Material:Stainless SteelAvailable Model:16*22/17*25/18*22/19*25 Large/Medium/Small If you want to change size,please feel free to contact with us. Application torque spring before the main arch wire with 0.46 mm x 0.64 mm stainless steel wire, the torque hole through the main arch wire fixed on both ends of the spring, strength of the single spring torque with crowns are angled lip not to exceed 90°, strength direction for the direction of the coil spring open.Torque according to need to move in the direction of the torque spring and lever on the gum or teeth braces or tooth crown, such as the need to move to the tongue palatal side root (positive torque) add in orthodontic bracket arm of gum, root need to move to the labial side (negative torque) arm placed in braces tooth or party.The routine was rediagnosed around 4 weeks.