Product name: Mandibular Trainer Product size approximately: 3.5*3*3cm/1.37*1.18*1.18in Blue 30 lb 40 lb.Black 50 lb. Product color: as shown in the picture Product material: silicone Features: 1. Jaw contour shaping: blue 30lb, 40lb, black 50lb, it is recommended to purchase a combination pack to train your wrinkle lines from simple to difficult, our jaw contour training equipment is designed to help you create a well-defined and well-defined jawline. By targeting and exercising facial muscles, this product can help enhance your jawline, making your face more chiseled and attractive. 2. Facial muscle exercise: This device is specially designed to exercise and strengthen facial muscles, especially the jaw muscles. Regular use can help tone and tighten muscles, improving overall appearance and facial contours. 3. Silicone material: Our jawline trainer is made of high-quality silicone, which is soft, safe and comfortable to use. The material is hypoallergenic and odorless, ensuring a pleasant and hygienic training experience. 4. Easy to use: Our jawline trainer is easy to use and can be integrated into your daily life. Simply place it in your mouth and perform repetitive chewing or clenching movements to exercise your jaw muscles. It's compact and portable, allowing you to use it anytime, anywhere. 5. Versatile and Effective: In addition to contouring your jaw, our training device can also help relieve stress and tension in the jaw area. It is suitable for use by men and women of all ages, making it a versatile tool for facial muscle training and relaxation. Precautions: 1. As we all know, different computers display colors differently, and the color of the actual product may be slightly different from the following pictures. 2. If you find it difficult to choose the size, you can contact mewe at any time and we will give you some suggestions, but they are for your reference only. Delivery content includes: 1 piece of jaw trainer (without lanyard) or 3 pieces of jaw trainer + lanyard