From the website:
This bunker will provide hard cover for your troops in most 28mm wargames from WW2 based games to modern and sci-fi, and includes these features:
Measures approximately 170mm x 145mm x 60mm.
Internal height clearance is 48mm.
Will accommodate up to 12 miniatures on 30mm round bases.
Removable roof held on with magnets (included).
Self-standing removable rear door.
Internal detailing including roof access ladder and hatch.
External damage detailing.
Includes the "Concrete Bunker Accessories Pack" free.