This is a model of a 5″ Queen Post w/pin in F-scale. These are used to support the truss-rods under the deck of most early pieces of rolling-stock.
Note; All of my white metal casting parts are noted in F-scale (1:20.32) measurements. That being said, all or most, can also be used on any other Large Scale Model. If you need measurements of a part that may interest you confirmed, please contact me with your request.
I also design and run new molds for vendors, clubs and any special part or project you might be thinking about. Give me a call and we can talk about how we get it done.