Caldwell Block and Tackle

A home owner from Lincoln City, OR says:
This appears to be a Caldwell series 86 block and tackle balance. It is stamped Caldwell 20 4 KR. I am enclosing pics of the good balance. It is for a 24 by 34 non tilt double pane pvc window. It is 1/2 inch wide and the metal frame is 21 inches long with the overall length including the top and shoe 23 and 1/8 inches. I tried to identify it from your site but had trouble distinguishing which top or shoe would be correct and did not know what length to order. I would like to purchase 2 of these so that I would have equal tension on the sides after reinstalling the balances.
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Hey, thanks for posting. I've narrowed this down to two possible channel balance Series: either our Series 380 or our Series 385 balances.

Now, as you can see, there is only one difference between these two Series, and that is their bottom shoe. The Series 380 uses the 15-005 while the Series 385 uses the 15-004. I can't quite tell what you have based on your pictures, though. Please carefully compare their dimensions to your own hardware and see which is a better match.
15-004 and 15-005
A home owner from Lincoln City, OR says:
Thanks for the info. That is exactly why I couldn't tell which one it was. I just checked and the 1 and 3/32 shoe is what I have. I will order a couple of the series 385s.
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