
Used for 20 gallon length. The lid fits perfectly in length but is about an inch larger in width. In the end, a thumbscrew was made that threads into a welded square nut on the inner rim to put enough tension on the tank to hold it in place and prevent gunfire. Fantastic quality screen. I just wish I knew it was too wide to fit a 20 long. The rim is tack welded so it's possible to break the welds to shorten the length and weld them back together, but I haven't had enough time to find out if that's feasible.

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