left hand side rail lower sash coil balance shoe. dimensions 2.0" high, 1 1/4" width. Depth around .5". I don't know window brand.
Tom from SWISCO responded:
June 22, 2020
Hello! If your shoe is 1/2" thick, then you could potentially use our 15-046 as a replacement. That's a very important dimension though so I recommend triple checking it just to make sure it's accurate.