Product parameters: Material: silicone Color: black+purple+blue Product size: 4.1 x 3.4 x 2.6 cm Package includes: 3 * Masseter Balls Product Description: - Material: Jaw Neck Trainer is made of food grade silicone, safe and non-toxic. The polyurethane braces shape your mouth individually, allowing you to easily adapt to your mouth. - Jaw trainer features: Say goodbye to double chins and bulky facial muscles. - This toned jaw trainer helps to sculpt the face, neck and jaw and activates all facial muscles for a more youthful appearance. - With Jaw Trainer: Exercise for 10 minutes three times a day and see results within a few weeks. You will lose all your jaw fat. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store