Hello my Vinal window channel balance is not working at all. it is 21 years old and the springs are rusty. I cleaned and added lithium lube and still not working. so I think its time to replace them.
On the metal part the stamp is 08 007 1420. The overall length is 16" and the metal frame is 15". The frame with is 1/2" wide.
Can you help me select the correct product?
Thank you
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Lauren from SWISCO responded:
March 7, 2023
Hello, thank you for posting, It appears you have either our Series 351, with a 15-002 bottom attachment, or Series 390, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You will need a 15" balance with a 1420 stamp option. Please review and let me know if you have any additional questions. 
Comparison of the S351 and S390 balance shoes.
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