Alenco window replacement balances

A home owner from Las Vegas says:
May 5, 2017
I need to replace channels on two windows by Alenco one says 21 D and the other says 19D
User submitted photos of a window balance.
User submitted photos of a window balance.
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Tom from SWISCO responded:
May 9, 2017
Thank you for your post. We feel you may need our Series 351 or Series 390 channel balance. Please take a look and let us know what you have come up with.
A home owner from Las Vegas says:
May 9, 2017
Yes 351 or 390 look right but my shoe looks slightly different will it still work. I can't tell any difference between 351 and 390
My channel says 21 D but the actual length of the metal is 22 the other window says 19 but the metal is 20 inches, what length do I order?
channel balances
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Tom from SWISCO responded:
May 11, 2017
The style of your shoe is fine, what's more important is the depth. We have detailed dimensions on each balance showing what shoe they come with, and how big those shoes are.

Your stamps and lengths make sense. A balance with a 21 D stamp would be 22" long, and so on. Keep in mind that your old "21 D" stamp usually corresponds to our 2140 option.
20" Series 351 Channel Balance
20" Series 351 Channel Balance
S351-20
$9.59
22" Series 351 Channel Balance
22" Series 351 Channel Balance
S351-22
$9.91
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