27 4 HX CMC 11

Contractor from North Houston
1/2" wide metal frame that's 28"long not including the plastic ends. I have 4 windows that all need the same new balances. Thank you. 
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Lauren
Lauren from SWISCO
SWISCO
Expert

Hello, thank you for posting,

It appears you have either the Series 351, with a 15-002 bottom attachment, or Series 390, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. 

You will need a 28" balance with a 2740 stamp option. Please review and let us know if you have any additional questions! 

Comparison of the S351 and S390 balance shoes.
Comparison of the S351 and S390 balance shoes.

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