Etched brass Industrial style windows. This pack contains: 8 11mm x 6mm Round Top Window Frames, 6 10mm x 6mm Round Top Window Frames, 4 6mm x 9mm Rectangular Windows Frames, 2 15mm x 12mm Skylight Frames, 2 3mm Diameter Porthole Window Frames, 4 Small half Round Window Frames. These windows are suitable for N Gauge model railway layouts.