200Pcs Dental Orthodontic Buccal Tubes Monoblock First Molar Tube MBT 022 USA. One-piece / Monoblock Bonding Molar Tubes. 4pcs per set (UL + UR + LL + LR). Totally 50 sets per box. 1 box (50 sets buccal tubes per box : UL + UR + LL + LR). First Molar Monoblock MBT 0.022. The sale of this item may be subject to regulation by the U. Food and Drug Administration and state and local regulatory agencies. City State: Zhengzhou, Henan China.