Channel Balances required for 3 NuAir 3'0" x 5'0" single hung insulated glass windows

A quick learner from New Smyrna Beach says:
August 1, 2017
Existing balances marked "J 2444#", metal channel is 1/2" wide and 25" long excluding the plastic end pieces. The sash weighs approximately 22 pounds.
Channel balance
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Tom from SWISCO responded:
August 3, 2017
Thanks for shopping with us. It looks like you need either the series 380 or Series 385 balances. The difference lies in the shoe. The series 385 balance has the 15-004 shoe which is 1 1/32" deep from front to back. The Series 385 has the 15-005 shoe which is 1" deep. If you measure your shoe you should be able to determine which one you need. Please let me know if you have other questions.
A quick learner from Florida says:
August 3, 2017
Which is the shoe and how should I measure it? I would not expect 1/32" to matter very much.
A quick learner from Florida says:
August 3, 2017
What is the lead time for 6 of either of these parts?
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Tom from SWISCO responded:
August 4, 2017
My apologies, I mistyped. The 15-004 shoe measures 1-3/32" from front to back, not 1-1/32". You're right about 1/32 not making a difference; 3/32 just barely does! The shoe is the bottom plastic piece, shown in the center photo above. You'll want to measure it like this:
Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
25" Series 385 Channel Balance
25" Series 385 Channel Balance
S385-25
$10.55
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