Features: Orthodontic braces effectively prevent children from gnawing teeth, irregular teeth, restoring cavities and irregular teeth. There are three types of this teeth straightener in total. if you need to restore a neat tooth, you need to use it from the first stage to the third stage. therefore, it is recommended that you directly purchase the three-stage orthodontic braces at one for time. The product needs to be used continuously during the day and night. Use 2-3 hours during the day and 8 hours for sleep at night. Because the teeth are not in a state that can be repaired in one day, the use of this product needs to be sustained and cannot be abandoned halfway. Wonderful gift ,the dental braces can be a sweet gift for friend ,family ,instanted smile. Specifications: Material:TPU Tape:Stage1,Stage2,Stage3,Stage 4,3 Stages Set Package Includes: 1 or 3Piece Orthodontic Braces note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item.