Queen Series Orthodontic Bracket Features: â?? low profile ensure patient comfort â?? precise technique data expression by CNC technology, high efficiency in treatment â?? smooth surface and slot, less friction â?? laser welding for jointing the S.S pad with the body, more safety and healthy Material: Medical S.S 17-4ph Workmanship: CNC Bracket tolerance: +0.001" Service: Customized tech data on any tooth available. For example, MBT cuspid with Torque "0" Notice: