Exercise and train the tongue with 10mm/.39" ball.
Letsip® K4 (55mm/2.17") Letsip® K5 (65mm/2.56") Letsip® K10L (large = 53mm/2.09")
Exercising the tongue inside the mouth
The Letsip K-series was developed specifically for the exercising of the tip of the tongue, and to develop the lateral movement of the tongue. Practice speed and agility, whilst improving your oral muscular conditions for eating, drinking and clearer speech.
K10 tongue trainer
The Letsip K10 involves exercising the tongue, by lifting the tip of the tongue inside the mouth. This Improves the following sounds: rolling r, l, n, d and t, as well as general strength, developing precision, speed and agility.