I bought this as part of the accessory bundle with a Karu 12G. It is almost impossible to fit because it is so tight, so I went back to Ooni to check that I had been sent the right cover. It is clearly designed for the Karu 12 and not the Karu 12G (they are slightly different in shape) but I was told that it is suitable for both. On the back of that advice I tried to fit it again and broke the handle on the fuel cover. Be vary wary of purchasing this for a Karu 12G Oven!