SWISCO - The Replacement Hardware Authority

28" Non Tilt Block and Tackle Window Balance 5/8" Stamp 27-3 and Stamp 27-5

A home owner from Austin, TX says:
Hello, my windows balance is broken and I found out the specs as below:

28" Non Tilt Block and Tackle Window Balance 5/8" Stamp 27-3
28" Non Tilt Block and Tackle Window Balance 5/8" Stamp 27-5

Could you please advise the replacement part in your store, and is there anything for stamp 27-4 as well? Thanks.
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Tom from SWISCO responded:
Thanks for contacting us. I'm afraid I cannot identify what Series you have based on the stamp alone. All that tells us is how strong the spring is. The two you have are for two different spring strengths, though. Are these in the same window? If so, they really should be the same. I would recommend weighing your sash on a scale to confirm how strong it is. We have a chart on each channel balance store page that lets you know how much weight each stamp option can support. You can use that as a reference.

In the meantime, I recommend that you look at our Channel Balance Home Page and follow the steps in order to find the Series that best matches what you have.
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