16" and 29" window balance replacements

A quick learner from Maricopa, Arizona says:
Hello I am trying to purchase a few window channel balances, but not sure which part will work for my windows. I will need two sizes, 16" and 29". I attached photos of the top and shoe attachment. Thank you for your help. There are no names or markings on the balances. However there is a ink number on the 16" balance (16 2 CX CMC 7) Thank you for your help.

A customer submitted photo of channel balance attachments.
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Paul from SWISCO responded:
Thanks for posting, Marty! It looks like your top attachment has wings, but your bottom attachment does not. Since this does not match any of our existing Series, your balance will have to be custom made.

Before we begin, however, I just need a bit more information, namely regarding the bottom attachment. Please look at our 15-001 and 15-002 and note their dimensions; the 15-001 is 1-1/8" deep, while the 15-002 is 1" deep. Which of these shoes more closely matches the shoes on both your 16" and 29" balances? Keep in mind that they may be different on both, so I recommend that you measure each closely.

Next, I just want to confirm the length on your 16" balance. Your stamp reads 16 2, and that usually implies that your channel length is 17". Is that true? Can you double check for me?

Please also confirm that there are no stamps on the 29" balance. If there aren't, we will need you to remove the sash from the window and weigh it. If we have the weight, we can help you determine the best option to choose.
A quick learner says:
Sir you are correct. The smaller balance is 17". I found a number on the other 29" balance. The number is 28-4 DA2 CMC 5. The shoe is 1" (15-002)
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Paul from SWISCO responded:
Thank you! In that case, I have two custom balance order forms for you. The first one is for your 17" long channel balance, and the second is for your 29" long channel balance. Please fill out the rest of the information on the two forms, and one of our representatives will be in contact with you shortly thereafter.
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