Caldwell 1/2" sash balance marked 20 5 AQ CALDWELL. 21" long (metal part).
A handy person from Ojai, CA says:
September 28, 2015
Need 2 of please. Please quote including shipping to 2036 Grand Av, Ojai, CA 93023
Paul from SWISCO responded:
September 29, 2015
Looking at your nylon caps, I think our S390-21 would be a good match. I would also recommend the 2050 option. See if you agree.