G scale tunnel portals for your indoor or outdoor model railroad are detailed to create realistic scenery for entrances to tunnels & mountains on your toy train G gauge layout. Total Quantity: 2 tunnel portals. Outer Dimensions: 18 inches wide x 12 inches high. Opening Dimensions: 12 inches wide x 9 inches high. Origin: Hand-built in our Western Pennsylvania workshop at MrTrain. Material: Durable polystyrene foam. Finishes: Weather-resistant waterproof stains and glues. Accents: Decorative wooden top cap & mantel painted white. Color: Classic concrete gray finish. Large scale or G scale (45 mm or 1 3? 4 inches, G gauge) is a track gauge for model railways which, because of its size and durability, is often used outdoors. G scale 1:22 – 1:24 scale tunnel portals are designed to enhance the realism and functionality of model train layouts by providing visually appealing entrances for tunnels. These particular tunnel portals are made with polyurethane foam textured finishes to simulate real-world structures. We make other G scale train scenery, so feel free to browse our store to see what else you need for your Piko, LGB, and other brands of G gauge trains. G Scale G GAUGE RAILROAD DOUBLE TUNNEL PORTALS / Garden Railroads – Set of 2 for your model train railroad layout. This is for 1:22 – 1:24 G scale train scenery.