This is a set of four HO-scale 2'9" diameter 8-spoked wheels for HO model railway wagons (9.6 mm diameter). The axles are 24.5mm long between pinpoints and they should fit my HO-scale GWR Loriot L (G13) model. Detach them from their sprue/cage at the little joins behind the wheel backs, and cut the cage to get them out. Paint and fit them, taking care not to break the pinpoints or the wagon if it is made from similar plastic. Check the wagon before you try, then (if necessary) drill the cone sockets a little deeper and file the grooves below them so you don't need to bend the axleguards more than a fraction (less than half) of a millimeter.