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Casey from SWISCO responded:
April 20, 2023
Hello, The assembly shown in your photos resembles the S900-30 but these types of spiral balances do not normally have a stamp code on the tube. I would like to see photos of the stamp to determine if the S900 would work as a replacement. As for your pivot shoe, we would need to see a photo of yours fully removed from the window, as well as confirm the exact width and thickness, to compare to our inventory. Thank you! |
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Casey from SWISCO responded:
April 21, 2023
Thanks for getting back to us. We believe that the S900-30 spiral balances will work for your application but you will need to weigh your window sash and follow the chart under the product description to confirm the correct color option for your replacements. As for the pivot shoe, we can be sure what you need with the part still installed but what a can see reminds me of the 15-134. See the specifications below and the video showing the cutout method to replace these parts. With that being said, you can reuse the original pivot shoes if they are still in good condition. 
Alternate image for 15-134
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