The Happy Tongue is a solid mouth piece with a unique ported shape to give maximum tongue relief. The standard happy tongue is curved to be softer on the bars and slow in applying tongue pressure.
The Eggbutt cheek is a traditional fixed cheek that helps prevent pinching of the lips and gives a solid feel against the cheek. The shape helps prevent the bit from being pulled through the mouth and introduced light poll pressure.
B14/09 - 14mm over bars and 9mm over tongue