N Timber Single Portal

Tunnel Portals Tunnel Portals are built at the entrance of tunnels to hold back rock and dirt. They come in single or double track widths, and are designed to fit the castings made from the Tunnel Liner Form (item c1250). N Scale (2 each) Outside: 2 5/8" x 2 11/16" - Inside: 1 5/16'" x 2"