A 3mm:1ft scale model of a British Railways Conflat B wagon body. These were a bit longer than the much more common Conflat-A wagon, and instead of carrying a pair of A-type containers (or a single B-type) they carried a pair of AFP containers typically carrying refridgerated fish. You will need a suitable 12' wheelbase 21'6" OHS chassis, and I have uploaded a few versions with different brake arrangements, and you can probably use the 3mm Society's kit as well.