Description: 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. Specifications: Material: Silicone Size:2.17*1.77in/5.5*4.5cm Color: Black, Gray, White, Yellow Package Included:1 Diving Mouthpiece Notes: Due to differences in lighting and screen settings, the color of this item may vary slightly from the picture. Please allow slight size differences due to different manual measurements. The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.