This is a replacement set of 3 axles and 1 drive gear for a HO Scale Bachmann 4-8-4 Northern, Second Version/generation.
Please note it's important to clean the inside of the axles and gear before inserting the wheel peg. Leaving any 3D print residue inside may cause the new parts to split when pushed onto the wheels.
These are designed to replace the original split axles.
These parts have been designed for Smooth Fine Detail materials.
For more information please see my blog - www.jamestrainparts.com