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| Group | n | Color | Manufacturer | |
|---|---|---|---|---|
| 1 | 24 | Colorless | American Orthodontics (Sheboygan, WI, USA) | |
| 2 | 24 | Pearl | Ortho Technology (Tampa, FL, USA) | |
| 3 | 24 | Pearl Blue | Ortho Technology (Tampa, FL, USA) | |
| 4 | 24 | Pearl White | American Orthodontics (Sheboygan, WI, USA) | |
