niti material round and rectangular shape for your choose orthodontic wire made of nickle titaniumQuality is excellentPacking:10pcs/baground wire size:0.012,0.014,0.016,0.018,0.020rectangular wire size:0.016*0.016,.0.016*0.022,0.017*0.022,0.017*0.025,0.018*0.025,0.019*0.025 dental wire