Feature:Orthodontic Stainless steel Arch Wire (rectangular) 1. 10pcs/pack 2. English Package 3. Used for Dental orthodontic treatment 4. Material: Stainless steel 5. Type: Rectangular 6. Natural Form Size Option: 0.016×0.016 upper, 0.016×0.016 lower 0.016×0.022 upper, 0.016×0.022 lower 0.017×0.022 upper, 0.017×0.022 lower 0.017×0.025 upper, 0.017×0.025 lower 0.018×0.022 upper, 0.018×0.022 lower 0.018×0.025 upper, 0.018×0.025 lower 0.019×0.025 upper, 0.019×0.025 lower 0.021×0.025 upper, 0.021×0.025 lower, One pack just includes one size, not mixed pack