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Emily from SWISCO responded:
January 14, 2022
Hello! It's hard to say since your balance is damaged but your bottom attachment reminds me of the one that comes with the Series 775 . If there is no stamp on your metal channel, you'll need to weigh the window sash and choose a spring strength option under the product description on our website. Look this over to see what you think and let me know if you have any questions. |
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Emily from SWISCO responded:
January 14, 2022
You're very welcome! If your balance is stamped "29B", then you'll need to select that stamp option on the S775-29 's store page. |