One-piece / Monoblock Bonding Molar Tubes. 4pcs per set (UL + UR + LL + LR). 2nd Molar Monoblock MBT 0.022. Totally 50 sets per box. 50 sets buccal tubes per box : UL + UR + LL + LR. The sale of this item may be subject to regulation by the U. Food and Drug Administration and state and local regulatory agencies. You feedback is VERY important to us! We strive to exceed all your expectations and put a smile on your face. We stand behind our products and pride ourselves on OUTSTANDING customer service.