This pilot filter fits LTI # 20 pilot filter canister. The filter comes with an o-ring for the canister. The dimensions of this filter element are:
Length: 2 5/8". Outside Diameter: 2 1/8". The center hole diameter is: 3 /4".
Not sure which canister you have? Call 717-354-4079 with your LTI aerial serial # for assistance.