Description 100% brand new, high quality Material: Food grade silicone There are 3 intensities, corresponding to 3 different colors, of which, 1. Yellow-first grade intensity (30lbs) 2. Cyan-secondary strength (40lbs) 3. Gray-three-level strength (50lbs) This fitness jaw exerciser can train one of the most important but still forgotten muscles in your body, the masseter muscle. For anyone who wants to tone, firm and strengthen the face and neck area, this is just for you! Easy to use. No need to set up-no need to boil or install to use directly. When you are on the way to work, in front of the computer or even at home watching TV, it only takes 10-15 minutes a day. You can also merge it with your current exercise for maximum effect. Through regular exercise, proper rest and nutrition, muscles will deform like other muscles in your body! Combining this equipment with regular exercises can increase blood flow throughout the head and face, thereby completing full-body exercises, including more than 50 muscles in the face and neck. With enough routine training, rest and nutrition, your muscles will grow into a more ideal shape like any other muscles. Quality first, provide the best service. Customers are our friends. Stylish design, 100% brand new and high quality! Package Included: 1Pc muscle training ball Note: 1. For photos, please allow slight color difference 2. Due to manual measurement, the size may be different