describe: 1. High quality: 100% brand new and high-quality, made of high-quality soft silicone, safe and healthy, to ensure your oral hygiene 2. Wide application range: Suitable for most people's size, widely used for tongue muscle, labial muscle, gutta percha and facial muscle training 3. Clean and safe: removable for cleaning, convenient and sanitary 4. Effectively exercise the strength and flexibility of the tongue muscle 5. Exercise the range and flexibility of jaw movement, increase the strength of biting and chewing Specification: Product Name: Facial Muscle Exerciser Material: Silicone (food grade) Size: 3*1. 5cm/1. 18*0. 6in Color: black, white, gray Note: 1cm error may exist in manual measurement, please understand. Due to different monitor settings, the color deviation may vary. We provide you with the best products and services. If you have any questions, please let us know and we will solve the problem as soon as possible. thank you very much.