Specification :

Model No.: YZ-MTH004
Features:
1) Made from 100% food grade material, high/full transparent of high 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 to rest your tips when open your mouth.
4) You are welcome your great idea for your order.

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