Check the listing for details. 50 Packs Dental Orthodontic Elastic Niti Arch Wire Rectangular Ovoid Form 2Pc/pk. Condition: New. Listed at 54.14 USD. Feature Dental Orthodontic NITI Reverse Curve Arch Wires (Rectangular ) Super Ductility and Strength Combination, Suitable for Various Complicated Instance With Constant Elasticity, the Curative Effect is More Remarkable Advanced Surface Smooth Process Brings Long Fatigue Life Use: For dental orthodontic treatment Material: NITI Alloy 1 pack contains 2pcs. Package: 2pcs/pack Size Option: 0.016x0.016 upper, 0.016x0.016 lower 0.016x0.022 upper, 0.016x0.022 lower 0.017x0.022 upper, 0.017x0.022 lower 0.017x0.025 upper, 0.017x0.025 lower 0.018x0.022 upper, 0.018x0.022 lower 0.018x0.025 upper, 0.018x0.025 lower 0.019x0.025 upper, 0.019x0.025 lower 0.021x0.025 upper, 0.021x0.025 lower Attentions: One pack just include one size, not mixed pack. Package list 1 pack ( 2 pcs ) , Total 50 Packs Please note the size in your order , or leave me message 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, do not bid on this item unless 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.