Check the listing for details. 20Pack Dental ART Root Torque Springs Spring 5 Loops Curved Anterior Upper Lower. Condition: New. Listed at 48.78 USD. Maxillary Root Torque Springs . 5pieces spring/pack. Total 20 Pack. Available size: Large Medium Small Lower in universal size. Advantage: Exquisite handmade Good Memory ART Auxiliary for maxillary and mandibular anterior root torquing. This auxiliary efficiently provides any degree of labial or lingual torque by simply inserting it above or below the archwire in most multi-bracketed techniques. Its many benefits include: Providing excellent mandibular anchorage The ability to easily overcorrect and faster tooth movement. 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.