Characteristic: Food grade quality silicone, healthy and odorless, soft and elastic, not easy to deform. Drag the tongue design, which is comfortable and easy to bite, preventing masseter muscle fatigue. Universal interface, easy to install, fits most regulators and snorkels.It can be used in conjunction with free binding. Name: Diving Mouthpiece Intended for: Adult Intended for Euqipment: Breath Tube, Second Stage etc Material: Silica gel colour: Pink Package Contents: 1 x Diving Mouthpiece Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.