Item Type: Tongue Tip Exerciser Material: PP, Alloy Size: Approx. 15.2 x 5cm / 5.98 x 1.97in Clean: Can be washed with warm water. Package List 1 x U Shape Tongue Tip Exerciser 1. It is not recommended to put it into boiling water or microwave for cleaning, nor into refrigerated room. It is recommended to wash it with warm water and wipe it before and after use.2. One person to use, do not mix, keep clean and health. 1Improve Flexibility: Tongue tip exerciser can be used to exercise the flexibility of the tongue, suitable for the pronunciation of children is unclear, and the elderly cannot speak clearly. 2Muscle Training: Tongue exerciser can improve the strength of the tongue muscle, the flexibility and stability of the tongue, effectively improving tongue coordination. 32 Training Methods: 2 Ways to use the tongue exerciser, up and down exercise training and alternate left and right exercise training, you can choose according to your own needs. 4Usage: Open your mouth, place the tongue training device in the corresponding position, push the ball from one side to the other with your tongue, the tongue must always touch the small ball. 5Excellent PP Alloy: Oral muscle training tool is made of food grade PP and alloy materials, safe and clean, stable and durable, which allow you can use at easy.