Woodland Scenics WC1163 Masonry Arch Culvert.
Culvert (Sewer/Drain) Portals - Masonry Arch - Pack of 2.
Use Earth Colours Liquid Pigment to detail culverts in your choice of colours.
Approximate outside dimensions are 31.7mm (length) by 30.1mm (width) by 24.6mm (height).