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S378-37 37" Series 378 Channel Balance

Hey there,I'm looking to replace my balance springs on my windows. They are 37" from metal end to metal end (not measuring caps) There's a stamp that says "3650 BS1F0"

3610 window balancer 1/2 inch wide. Not sure of exact type to order

The window balances are 37" long. They are stamped "36 4 LN CALDWELL".

This is a 3640 JR based on the engraving and I believe is 37 inches but can't identify further the exact model

Need balance

I need help in indieifying correct part ro replace the channel balance for non-tilt window. Hope the picture provide the details needed. The impring on the balance says 3630, and the lenght of the metal portion of ths balance is 37inches. If you need any addtional information please let me know. ... (cont.)

I need 4 balance rods for norandex windows in palm beach Florida. The metal part is 1/2 inch wide and 37 inches long. The number stamped on it is 3635. I'm not sure if it's a series 380, 385, or 390. If you could let me know I would appreciate it. Thank you. Robert

I believe there are wings on both ends. Can you please advise part number for these. Thank you. I am measuring 7/8” for shoe depth? The sash weighs 16-17 lbs and the sash guide 18-161 is the correct replacement. Thank you for your help and have a great day.

I would like to replace some of my original window channel balances and am looking to identify the correct replacement. The metal channel is 24" long and the channel is stamped with "2310". Below the stamp is the letters "BSI". I have included photos. Thanks.