These are 'nominally' O scale to represent Cast Iron spools to separate bridge stringers. Since the spools vary greatly in size and design they can be used in other scales also.
This version has 104 spools which I created "on the fly" for Shawn Branstetter. Since this is ready, has printed successfully and has been given the "thumbs up" by Shawn I am going to offer to the public.
Note: The shipping defaults to $12 currently for areas not covered (meaning outside the US). If you ARE in the US and get that simply empty your basket and email me firstname.lastname@example.org and give me your address with zip so I can fix that by adding your address to the shipping zones tables.