Window balance stamped 3440

A quick learner from Florida says:
February 27, 2023
Balance is stamped "3440". The metal part is 35" long, it is 5/8" deep, and 9/16" wide.
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Emily from SWISCO responded:
February 28, 2023

Hello there!

It looks like you need either our S380-35 or S385-35 with the 3440 spring strength option. The best match will depend on the depth of the bottom fitting as shown in the image below. You'll need to measure yours to determine which one you'll need for this repair. 

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
35" Series 380 Channel Balance
35" Series 380 Channel Balance
S380-35
$12.05
35" Series 385 Channel Balance
35" Series 385 Channel Balance
S385-35
$12.05
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