Window balances

A home owner from West Melbourne, FL says:
I have Kinco windows that were installed when my house was built in 1978. Kinco is no longer in business and I need to find replacement balances. Do your balances fit Kinco windows? I looked at the balances online, and the top of the 19-008 balance looks about right, but I don't recognize any of the shoes. I have a channel balance with 2040 on it. I have several more that are different sizes, but first I want to see if they will fit my windows. I have always replaced them myself, so I just need the parts.

I removed one of the balances and tried to take close up shots. The marking on the balance is 2040P; there are no markings on the window. I have other sized windows, so it you have this one, I will remove one of the balances from the larger windows to see the markings on them.

Thanks for your help.

User submitted photo of channel balance.
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Mike from SWISCO responded:
Hi Audrey, thank you for submitting your photos.

Before we determine your channel balance Series, we will need you to please give us the depth of the balance shoe shown in the bottom right corner. It will either be the Swisco 15-001 or 15-002 - you can use our images as a reference.
A quick learner says:
Is there any other information you could need beside the depth of the balance shoe? I have to take the window out each time to get to the balance and it's quite heavy since it is double-paned. I'd like to be able to get all the info needed while it is out.
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Mike from SWISCO responded:
We just need the depth of the shoe and any markings you may find on the balance.
A quick learner says:
The shoe is 1 inch deep and 1 inch long. The channel is 1/2 inch wide and 9/16 inch deep. The only marking on the channel was 2040.

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Donna from SWISCO responded:
Hello Audrey,
Thanks for sending the detailed photos. The balance attachments appear to be SWISCO part numbers 19-002 and 15-002, used on our balance series 351.
Here is a product code link to get you started: 21" Series 351 Balance
and choose stamp option 2040.
A quick learner says:
Thank you. I will order a pair of them to see if they work. The bottom shoe doesn't look like mine, but then again the style might have changed since the late 70's.
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