Replacement Dry Airlock for VC Tanks itemID-36811 then this should suite you

then this should suite you nicely

Brewer’s Hops

used the same yeast

Thermometer with 2" Probe and 3" Dial Face

Replacement Dry Airlock for VC Tanks itemID-36811 then this should suite youDry airlock with marble for variable capacity tanks. Features a threaded shaft, and a plastic backnut with gasket that screws onto the underside. The outside dimension of the threads is 1 13 16 inch, it will fit a hole from 1 13 16 in to 2 1 4 in wide. The inside measurement of the airlock is 1 1 2 inch. Includes a marble with allows the release of gasses, but will not allow air into the tank. The marble is the sealing device, no water or other valves