Check the listing for details. 20Pcs Dental Torque Spring Rectangular Anterior Archwire Orthodontic Spring Wire. Condition: New. Listed at 7.39 USD. Dental Orthodontic Single Anterior Teeth Torque Ortho Rectangular Spring Packing:Total 20 Pcs, In Bulk. Material:Stainless Steel Spec: Applicable to all kinds of Arch Wire Square Rectangular. Available Size:1622 Large/Middle/Small 1725 Large/Middle/Small 1822 Large/Middle/Small 1925 Large/Middle/Small For control of a single tooth faciolingual inclination 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. FDA STATEMENT The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, you can bid on this item only if you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item. Folllowing are our detailed information, if any special request, you can contact us, we are the honest seller in China! Account Name:MypowerdentistCity: Zhengzhou State: HenanPhone Number: +86 15090018974 or +86 371 55037248