1-20 Boxes Dental Orthodontic Monoblock n-conv single buccal tube roth 0.022. 4pcs/set, 50 sets/Box, total 200 pcs/Box. Work with Orthodontic bracket brace, Orthodontic niti arch wires, orthodotnic elastic chain, elastic bands.. Total: 1, 2, 3, 5, 10, 20 boxes optional.