Check the listing for details. Dental Ortho Torquing Torque Spring Rectangular Anterior Teeth Arch Wire Springs. Condition: New. Listed at 3.93 USD. Price listed is for: 10pcs = 1 pack. Package :0.016*0.022,large/middle/small,10pcs/pack0.017*0.025,large/middle/small,10pcs/pack0.018*0.022,large/middle/small,10pcs/pack0.019*0.025,large/middle/small,10pcs/pack Product Description:Application torque spring before the main arch wire with 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. Applicable to all kinds of Arch Wire Square Rectangular