5x N Gauge Brick Walls. Model Railway Scenery. 100mm X 40mm. These walls are an excellent addition to your N gauge layout. Each wall piece measure 100mm x 40mm. This listing is for 5 wall pieces Made from high quality 2.0mm thick Medite (laser quality MDF), plain finish ready to be painted and decorated. These item are laser cut, the laser cutting process produces a brown finish to the edges of the MDF. All laser processing marks can be easily removed by a light sanding or simply painting over.