Orthodontic Stainless steel Arch Wire (rectangular)1. 10pcs/pack2. English Package3. Used for Dental orthodontic treatment4. Material: Stainless steel5. Type: Rectangular6. Natural FormSize Option:0.016x0.016 upper, 0.016x0.016 lower0.016x0.022 upper, 0.016x0.022 lower0.017x0.022 upper, 0.017x0.022 lower0.017x0.025 upper, 0.017x0.025 lower0.018x0.022 upper, 0.018x0.022 lower0.018x0.025 upper, 0.018x0.025 lower0.019x0.025 upper, 0.019x0.025 lower0.021x0.025 upper, 0.021x0.025 lower,One pack just includes one size, not mixed pack