high qualityMaterial: Food grade silicone has 3 strengths, corresponding to 3 different colors,1. Yellow first strength (30 lbs) 2. Cyan secondary strength (40 lbs) 3. Grayscale third strength (50 lbs)This fitness jaw exerciser trains an important butstill forgotten muscle in your body, the masseter. For anyone looking to tone, firm and strengthen the face and neck area, this is just for you Easy to use. No setup required - ready to use without boiling or installation. It only takes 10-15 minuteswhen you are on the way to work, in front of the computer or even at home watching TV. You can also combine it with your current practice for great effect. With regular exercise, proper rest and nutrition, the facial muscles will deform just likeany other muscle in your body Combining this device with regular exercise increases blood flow to the entire head and face for a full-body movement, including more than 50 muscles in the face and neck. With enough regular training, rest, and nutrition,your facial muscles, like other muscles, will grow into a more desirable shape.Stylish design, 100% brand new and high quality Notice:1. For photos, please allow slight color difference2. Size may vary due to manual measurementPackage Included:1 facialmuscle training ball