SWISCO - The Replacement Hardware Authority

Window balance replacement

A quick learner from Sacramento, CA says:
Hi, I wrote few weeks ago to ask if I can replace a cord in widow balance (http://www.swisco.com/discussions/Can-I-replace-the-torn-cord-in-a-window-balance-77-67367) and was told that I'd need a new balance Series 380 or Series 385, depending on the size of the bottom shoe). So I just want to confirm that this would be the right part to order: http://www.swisco.com/27-inch/pd/Series-385-Channel-Balances/S385-27. I assume I need to replace both balances, not just the one that failed, right? And they are the same for left and right sides? Many thanks.
User submitted photos of a window balance.
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Tom from SWISCO responded:
Thanks for posting. Yes, you will need to replace both balances, and they are the same for both sides. As for which you have, I can't say for sure without knowing the size of your bottom shoe. Just by eyeballing it, the Series 385 may be closer, but you will have to measure it and use your best judgement.
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