This is a Railtrax, 3D resin printed in the UK, replacement for the small gear (21 toothe) only for Hornby Britannia, part number X9607. and Standard class 4MT, part number X9993. In both cases, you will need to reuse your existing larger 25 tooth gear (available on another listing with this gear) and your existing metal shaft Please do not order if you don't have the necessary skills to fit this item. A level of mechanical competence is required to fit the gears.
