Window balancer

Quick Learner
Balance stamped It is 2950 BSI -Lenght- 29-14/16".
Balance stamped 35 DS 35-Lnght is 36"
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4 Replies
Emily
Emily from SWISCO
SWISCO
Expert

Hello!

Thanks for reaching out to us. We're happy to look into this. Can you show us closer photos of the top and bottom fittings? Can you also confirm if these balances are used in the same or a different window? 

Regarding the 2950 balance, the length should be 30". Can you double-check this for us? You want to make sure to measure only the metal channel when determining length. 

Quick Learner
Balances ae from different windows.  2950 stamp measures 30".
Emily
Emily from SWISCO
SWISCO
Expert

Thank you for confirming. You may have the Series 380 or Series 385 channel balances. The S380 has a 1" deep shoe and the S385 has a 1-3/32" deep shoe. You'll have to measure as shown below to determine the best match. 

For the 2950 balance, you can select the 2950 stamp.

We don't have a 35DS35 stamp but we do have the 3550 and 3560 stamp options. A pair of balances with the 3550 stamp will support a sash weighing 30 to 35 pounds. A pair of balances with the 3560 stamp will support a sash weighing 35 to 39 pounds. We recommend you weigh the window sash on a scale to determine the best stamp option for your replacements. 

Please let us know if you have any questions! 

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

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