4mm/1: 76 scale for OO railways or 20 mm wargames.
Stone tunnel portal to span a 48 mm wide gap.
Can be used a s small railway under bridge for road traffic.
Not suitable for running locos or rolling stock under unless narrow guage.
Dimensions. 80 mm wide x 4 mm thick x 65 mm H. 46 mm H to underside of arch.