The Maestro Bracket System is Metal Injection Molded (MIM). Advanced technology for manufacturing complex metal products. MIM translates into rounded contours and complex structures that machined brackets cannot duplicate providing corrosion resistance, strength and proven performance. Rhomboid-shaped brackets and pad align with the tooth edges. Small profile is balanced with deep tie-wing undercuts that secure ligation. 80-gauge micro-etched bondable mesh pad offers proven bond adhesion. Upper & Lower 5x5 - Hooks on 3's; 4's & 5's. **For further product information, please contact Chat Support**