Replacement grips for the TF-45 transmitter. Includes standard size with a smooth texture and a large version with a studded pattern for extra grip in large hands. #105420 - HPI TF-45 2.4GHZ TRANSMITTER (3CH)#105422 - HPI RF-45 RECEIVER (2.4GHZ/3CH)#105424 - HPI TF-45 / RF-45 2.4GHZ RADIO SET#105429 - HPI TF-45 GRIP (SMALL/LARGE)