Function: 1. Application: The tongue tip exercise set can be used to practice language flexibility, which is suitable for slurred speech, rigid language, incomplete pronunciation. 2. Muscle training: exercising tongue tip helps to train the strength of the tongue muscles, effectively improves the strength of the tongue muscles and the ability to coordinate the tongue. 3. Improve language flexibility: The tongue tip practice tools allow the trainer to independently master language flexibility and stability. 4. Package includes: There are 3 different tongue tip exercise instruments, with steel balls of different size for oral muscle training, which is convenient to use. 5. Polypropylene stainless steel: oral muscle training tools made of food grade polypropylene, 304 stainless steel, safe and environmentally friendly, stable and durable, which are easy to clean. Specification: Item Type: Tongue Tip Exercise Set Material: food grade polypropylene, stainless steel 304 Diameter of the round ball of the trainer: approx. 8mm / 0.31 inch Semicircle trainer ball diameter: approx. 10mm / 0.39 inch C-shaped trainer ball diameter: approx. 12mm / 0.47 inch List of packages: 1 x Round Tongue Tip Trainer 1 x Semicircular Tongue Tip Trainer 1 x C-Shaped Tongue Tip Trainer