Foam Walling – Double Tunnel Mouth & Walls GM199 Gaugemaster

Tunnel portals provide a neat and tidy entrance to the bore and hold back the hillside above and around the tunnel entrance. This example is a double track portal based on a prototype in Midlands. Full instructions are included on how to make the most of this item. Width at bottom 105mm. Maximum width 110mm. Height at centre 84mm.