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S378-18 18" Series 378 Channel Balance

Hi, I need help identifying replacement window channel balances. Here are the details: - Original stamp: 17 2 KQ CALDWELL - Channel length: 18 inches - Channel width: 1/2 inch (across open front) - Channel depth: 9/16 inch (0.55") - Top fitting: winged bracket - Bottom fitting (shoe): triangular ... (cont.)

18 inch length 9/16 width stamped 1720 winged plastic pieces i just need help determining which series this product is, as a couple of them look similar.

I need replacement for this window balance

The code on the old balancer is 2305. I did not see it on the chart. My sash is about 50 x 24 single pane. Do you have a recommendation for a 24" series 378? attached a photo. Thanks, Hugh

Markings: 1720 BSI Bv

Hello i need to replace. Can tell me which ones i need?