Looking for a channel balance

A quick learner from Henderson, Nv says:
I'm looking for a pair of channel balances I think there called. They hold up a sliding none tilting window. They have a spring in them with a string and clip. The metal clip hooks up to the frame. The only model no or part no I have was stamped onto the balance I have.

26 4 HV CMC 7

Do you have this part?
User submitted picture of 26 4 HV CMC 7.
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Tom from SWISCO responded:
Thanks for posting! Before I can offer an applicable replacement for this channel balance , I just need to know a bit more information about the bottom attachment. Please take a look at our 15-004 and 15-005 channel balance shoes, and note their depths. As you can see, they are 1-3/32" deep and 1" deep, respectively. Which one more closely matches your own bottom attachment?

Can you also tell me the length of the metal channel? Please do not include the plastic attachments in your measurements.
A quick learner from Henderson NV says:
Hey Tom

The channel balance shoe I have most closely matches item 15-005 , and the length of the metal channel without the plastic end attachments measure 27inches.

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Tom from SWISCO responded:
Great! Thanks for the additional information. Please take a look at our S380-27 channel balance. Does that look like it matches up? For the stamp option, I also recommend the 2640, which can carry a window sash weight range of 19 through 26 pounds. Would that carry your sash?

Please keep in mind that the weight range information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
A quick learner from Henderson, NV says:
Yes that matches pretty exact, although what is the stamp? and yes I would say the sash is about 19-26lbs
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Tom from SWISCO responded:
The stamp option is what determines the strength of your balance. For this balance, I'd recommend the 2640 stamp option.
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