Wide range of applications: a size suitable for most people, widely used for tongue muscles, lip muscles, teether and facial muscle training 3. Clean and safe: it can be disassembled and cleaned, convenient and hygienic 4. Effectively exercise the strength and flexibility of the tongue muscles 5. Exercise the range and flexibility of jaw movement, and increase the strength of biting and chewing Specifications: Product name: Facial muscle exerciser Material: Silicone (food grade) Specifications Size: 10cm*7cm*2cm Packing: Opp bag Color: White, Gray, Black Package List 1 x Jawline Exerciser Notes 1. Manual measuring, please allow slightly measurement error. 2. Due to the difference between different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.