31" Channel Balance

Quick Learner from California
Hello, I need to replace two 31" channel balances, I think I need the 380 (1" deep guide foot) but I can't figure out the proper weight range and it's not possible to wiegh the sash. The stamp on the original channel balances is 31 3 GV 7, as shown in one of the photos. Perhaps the "3" on the original channel balance correlates to 3030? Can you help.  Thank you. Sincerely, Dave
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2 Replies
Bob
Bob from SWISCO
SWISCO
Expert

Hello there. Double-check the metal channel length. A stamp of 31-3 usually indicates a 32" long balance. If so, and if the shoe depth is 1", then this is an S380-32 channel balance. For a stamp option choose 3130.

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