Product name:Jaw Trainer Product size about : 30mm*14mm/1.18in*0.55in Product color: As shown in the figure Product material:Silica product features: 1.This Facial Bite Ball is a tool for exercising facial muscles. It is made of soft silicone material that is flexible and can be used to exercise the jaw and bite muscles. 2.Using the bite ball can help strengthen the jaw and bite muscles and improve facial lines and contours. This trainer can be used anytime and anywhere to exercise your facial muscles, whether at home or on the go. 3.This bite ball is soft and hard, the size is designed according to the human mouth shape, just the right size, available for both men and women. It can be sterilised at high temperature and is heat resistant up to 230 degrees Celsius. 4.Simple to use, just put the trainer into your mouth, bite or nip the trainer, and then perform a series of biting exercises. Through repeated use, you can gradually increase the strength of your jaw and bite muscles to achieve the effect of shaping your facial muscles. 5. It is important to note that when using the silicone facial bite ball and jaw trainer, you should pay attention to moderation and do not over exert yourself to avoid discomfort or injury. In addition, if you experience any discomfort or pain, you should stop using them immediately. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 pc Jaw Trainer