Fits any 8x8 Arctic Spa hot tub. This is the best traditional hot tub cover in the world. The foam insert is sealed in a metallic bag which prevent water vapour from getting into the foam. This makes the cover last many many years longer that other covers. Its 5 inches thick tapered to 4 inches for water run off which makes it able to handle massive snow loads and you can even stand on it to shovel snow off. The weathershield material on the outside is better than vinyl because its lighter and will never crack no matter how cold it gets. Shipping covers is tricky so call us for advice.