Window balance

Quick Learner from Tallahassee
I am looking for a replacement window balance (x2).The length of the channel is 30inches and there isn't any stamp/number on the original.
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Bob
Bob from SWISCO
SWISCO
Expert

Thanks for posting. If the metal channel, not including the nylon attachments at both ends, is 30" long, then you need either a S380-30 or S385-30 Channel Balance. The only difference between these two channel balances is the 'depth' of a bottom nylon shoe, or the 'heel-to-toe' measurement. See below. Measure your old balance's shoe to see what Series matches best.

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

You also have to choose a stamp option, which reflects the balance's strength. If your old balance has no visible stamp, weigh the widow sash these balances support. You can then match that exact weight with one of the weight ranges listed aongside each stamp option under the product description on either the S380-30 or S385-30 shop pages. 

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