Product review (4 stars): Double check for leaks after you install.
This drain does the trick - but it took some messing around first.  The drain fit into the air condition with no issues.  It was needed for an installation where the air condition was more or less in the house (enclosed, through the wall installation, but the rear of the air condition sat flush with the wall due to design of apartment).  The issue occured when the drain tubing (not included) was attached to the drain.  It weighed the drain to one side, and caused the seal to be broken enough for water to drip out of the seal.  This was fixed by fashioning a support system to prop the hose up, allowing the drain to reseal.  I had contemplated getting another one for my window unit, but I haven't figured out how I would support the drain plug yet.