Need to Replace Window block and tackle balances

Home Owner from San Ramon, CA

Hello. The balance broke on my window. I want to replace both sides for the window. The balance has the number "2680" stamped on it (no other numbers anywhere). The metal track measures 27" long and the track width is 1/2". The window measures approximately 32" high x 20" wide. The plastic end pieces have tabs/wings on them. Please recommend the proper replacement. Thank you very much.

Rosa  

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2 Replies
Bob
Bob from SWISCO
SWISCO
Expert

Hey Rosa. I believe this is either an S380-27 or S385-27 Channel Balance. The only difference between these two balances is the depth of the bottom nylon shoe. See the diagram below for reference. Compare both with your old balance to see what matches best.

Comparison of the S378, S380 and S385 balance shoes.
Comparison of the S378, S380 and S385 balance shoes.

You'll then have to choose a stamp option, which designates the strength of the balance. I read your old balance's stamp as '2630'--if this is true, select this as the replacement stamp. If it actually reads 2680, let me know, as this is not a stock stamp option. Many thanks. 

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