NITI Reverse Curve Arch Wire (Round & Rectangular) Material: NITINOL Size: (Round): 0.012"(0.31mm),0.014"(0.36mm),0.016"(0.41mm),0.018"(0.46mm),0.020"(0.51mm) (Rectangular): 0.016"x0.022", 0.017"x0.022", 0.017"x0.025", 0.018"x0.022", 0.018"x0.025", 0.019"x0.025", 0.021"x0.025" Packing: 2 pcs/pack Use: For orthodontic dental treatment Features: l Super Ductility and Strength Combination, Suitable for Various Complicated Instance l With Constant Elasticity, the Curative Effect is More Remarkable l Advanced Surface Smooth Process Brings Long Fatigue Life NiTi Arch Wires * Last up to 5 times more than Stainless steel * Larger working range than Stainless steel * Less distortion and more shape memory than Stainless steel * Easy to arrange in the bracket slots