channel balance

A quick learner from Bishop CA says:
March 13, 2018
I need to replace the balancers on my single hung, metal frame window. The channel measures 27" long, not including the plastic ends. the following numbers are stamped on the channel - 26 4 f1. Could you please help me choose the proper channel balancers.S380 and S385 both seem to have the same plastic ends as my old balancers.
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Casey from SWISCO responded:
March 14, 2018
Thanks for contacting us. I see that you mentioned both our Series 380 and Series 385 channel balances as looking almost the same. You are right, they look almost identical especially in the bottom balance shoe area. However, there is a subtle difference between the two of them; their measurements. Please visit the diagram below for the difference between the two shoes.
Comparison of 15-004 and 15-005
Comparison of 15-004 and 15-005


If this should help you decide which balance to choose as a replacement, great. If you still feel you need additional assistance, send us photos of your balance and we'd be glad to offer our suggestions.
27" Series 380 Channel Balance
27" Series 380 Channel Balance
S380-27
$10.55
27" Series 385 Channel Balance
27" Series 385 Channel Balance
S385-27
$10.55
Winged Channel Balance Shoe, 1-3/32" Depth
Winged Channel Balance Shoe, 1-3/32" Depth
15-004
$0.74
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