Replacing window coil balance

Professional from San Diego
Hello 
My name isSantiago I'm replacing two coil balance for an 8 pound window for a restroom
I need help identifying the correct balance I have attached pictures please let me know what are the parts I need to order thank you! 
3 user uploaded images
2 Replies
Bob
Bob from SWISCO
SWISCO
Expert

Hi Santiago. This looks like the S140-04 4 pound spring system to me. Please compare.

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