This is an HO-scale (3.5mm:1ft) model of a Great Western Railway Loriot L wagon (G13). See the notes of the TT120, 3mm and 2mm models too, please, especially before you try to fit wheels in (ideally prototype 2'9" 8-spoked, much bigger may not fit). I have uploaded a set of 4 axles for this (2 spares). There are brake blocks and v-hangers at one end, for you to attach DC III brake handles if you want. I have uploaded a set of 24 brake handles in HO scale for this; I anticipate you'll need spares sooner or later. If you are concerned about the weight of the wagon when unloaded, there is clearance below the floor at this scale to stick in a flat oblong sheet of metal - 0.5mm should fit - copper or brass should be fine, or iron or steel as long as you don't have magnets in your track. A well fitted sheet is likely to be heavier than lead shot mixed with glue - do the geometry and physics yourself if you don't believe me.