A complete set of ALL BALLS top and bottom steering head bearings and seals for the Gas Gas trials models, suitable for all TXT models from 2002 up until 2010. Earlier TXT's are different, and listed separately. These are also suitable for the early PRO models, and the Pampera models from 2002 - 2005. To double check these are the correct ones for your bike, please check your steering head or old bearings. These bearings have an OD of 42mm, and an ID of 20mm.