Block and tackle

Contractor from Prescott Az
Fiberglass mobile home window... installed in a Cavco mobile home. Metal end to metal end measures 27".
identified as 26.4
B.S.I.
RK
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Bob
Bob from SWISCO
SWISCO
Expert

Thanks for posting. See the S378-27, S380-27, or S385-27. The only difference between these three channel balances is the 'depth' of the bottom nylon shoe. See below. Measure your old balance's shoe depth to see what matches best. For a stamp option in any case choose 2640.

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

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