Kinro window sash balance replacement

A home owner from Coos Bay Oregon says:
March 18, 2019
Single hung Kinro window with spring sash balance. My current part has 26 4 stamped on it and is 9/16 deep by 1/2 inch wide.The foot is 1 1/16 deep by 15/16 wide. The head refer to picture. I think this lines up with your 385 window block and tackle window sash. I need 20 and want to make sure this is the right one. Can you help? I can send more pictures if needed. Thank you
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Bob from SWISCO responded:
March 19, 2019

Thanks for posting. Please confirm that the metal channel, not including the end attachments, is 27" long. If so, then yes, this looks like an S385-27 Channel Balance. The depth of the nylon shoe should be 1-3/32". It certainly looks greater than 1" in your photo, but it's hard to tell, so just double check this yourself to be safe. Your stamp of 26 4 conforms to our stamp option of 2640, which is for a window sash that weighs between 19 through 26 lbs. Let us know if you have any further questions.
27" Series 385 Channel Balance
27" Series 385 Channel Balance
S385-27
$10.55
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