Characteristic: Thermoforming tooth whitening mouthpiece can be changed into the same form of teeth in hot water over 80°C, it can replace the mouth tray made by dentist and its thermo stability is very good, it can be shaped again and again, the tooth marks are very clear and transparent. Scope of Application: It can be used with tooth whitening kit and tooth whitening system with LEDlight, and it can also be used for adjuvant treatment by dentist. Certificate: food grade material, CE certificate