25 4 CS CALDWEL Channel Balance

A quick learner from Cottage Grove, OR says:
I think I need a pair of 26" series 380 (2540) window balances, but mine is stamped "25 4 CS CALDWELL". I don't think this matches your option list.
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Donna from SWISCO responded:
Please remove the window sash and place it on a scale.
The weight of the window sash in pounds is needed to determine the proper stamp option.

Stamp option 2510 will carry a window sash weight range of 5 through 9 pounds.
2520, 9 through 15 pounds.
2530, 15 through 19 pounds.
2540, 19 through 25 pounds.

This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
A home owner says:
My channel balance is stamped 86 26-4 DA5 CMC 5. It is a Milgard window. Is this the proper channel balance?
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Donna from SWISCO responded:
We would be happy to take a look, please reply with detailed photos.
A home owner says:
Here are images of my channel balance.
Customer image of their Milgard window channel balance.
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Donna from SWISCO responded:
The balance shoe looks like SWISCO product code 15-004 and the balance top looks like 19-005.

This combination is our Series 385 replacement balance. See S385-27.
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