- Each have a special dual purpose .018 x .018 Vertical bracket slot for efficient tooth movement, Zero Tip and Torque and a simplified inventory system with identical color coding. - Our Composite Coralex Brackets have a unique base that provides both a chemical and mechanical bond to the tooth surface. The composite Coralex bracket may be bonded with all light cure and self curing bonding adhesives without plastic primers. 1 Pack Contains : - 10 Upper Brackets . - 10 Lower Brackets. **For further product information, please contact Chat Support**