Specification :

Model No.: YZ-MTH002
Features:
1) Made from 100% food grade silicone, high transparent, good quality.
2) It is double mouth tray. Thin and transparent so that easy to let the light whiten your teeth.
3) Humanise design of the two protrudings(double arch) to rest your tips when open your mouth.
4) You are welcome your great idea for your custom order.

Note: We are the only supplier in China here. It is patent product. If you saw the same or similar one in China here is the pirate.