11600-2 & D97 7#27 7 73 Relcement

Contractor from King of Prussia, Pa
Need the correct part to buy for the items in the subject above.
I don't understand the part numbering system and explanation would be helpful.
2 Replies
Tom
Tom from SWISCO
SWISCO
Expert

Hello! Based on your old stamp of 7#27, I recommend the 24-737 Andersen sash balance. 

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