This is a replacement set of 4 axles, idler gears and drive gear for a N Scale Bachmann 2-8-2or 2-8-0 (1st Generation).
These are designed to replace original split axles, the intermediate gears are optional and don’t always need replacing.
These parts have been designed for Smooth Fine Detail materials.
For more information please see my blog -
www.jamestrainparts.wordpress.com