Item Type: Tongue Tip Exercise Set Material: Food Grade Polypropylene, 304 Stainless Steel Round Trainer Ball Diameter: Approx. 8mm / 0.31in Semicircle Trainer Ball Diameter: Approx. 10mm / 0.39in C Shaped Trainer Ball Diameter: Approx. 12mm / 0.47in Package List 1 x Round Tongue Tip Trainer 1 x Semicircle Tongue Tip Trainer 1 x C Shaped Tongue Tip Trainer This product is consumable. If damaged, please stop using and replace in time. Use water to clean after use, do not boil in boiling water, do not put in microwave oven or steam pot. 1Usage: Tongue tip exercise set can be used to exercise tongue flexibility, which is suitable for slurred speech, stiff tongue, incomplete pronunciation. 2Muscle Training: Tongue tip exerciser helps training tongue muscle strength, effectively improve tongue muscle strength and tongue coordination ability. 3Improve Tongue Flexibility: Mouth tongue tip exerciser tools enable the trainer to master the flexibility and stability of the tongue independently. 4Package Included: There are 3 different tongue tip exercisers, with different sized steel balls for training your oral muscle, which is convenient for you to use. 5Polypropylene Stainless Steel: Oral muscle training tools made of food grade polypropylene, 304 stainless steel, safe and eco friendly, stable and durable, which are easy to clean.