UU Ortho Premium Bondable Buccal Tubes MBT (Pack of 20 Sets) Rectangular Funnel Entrances are designed with funneled entries on the archwire slot, resulting in easy archwire insertion. Smooth, patient-friendly hooks improve comfort for patients. The strong construction is due to the MIM manufacturing technique, low profile design, and distal notch that secures tie backs are the distinct features of this buccal tube. These features increase patient comfort and simplify treatment and reduce valuable chair time