Features: 1. The braces set includes three braces with different toughness and flexibility, designed to be used in three stages: first stage 1-2 months, second stage 2-3 months, third stage The third stage - 6 months. 2. It is recommended to use the alignment trainer continuously for 1-2 hours during the day and 8 hours at night 3. The dual functions of tooth alignment and muscle function training make braces play an effective role 4. Improve soft tissue function, 24-hour muscle strength exert force on teeth and jaw Specification: Material: TPEC Color: Transparent Size: 7x6x2.9cm Weight: 120g Note: 1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding. 2. The color may vary due to different monitors, please understand. Note: Hello, please pay attention to your delivery address when purchasing products. If your receiving information (such as: name, street, house number, doorbell/email without name, etc. is incorrect, the order will not be delivered correctly.)