Milgard Window Channel Balance
Thanks for reaching out to us! The balances you are searching for are an Extended-Travel Channel Balance and will need to be custom assemblies. That said, I've forwarded a link with a quote for (2) of the requested balances. You'll be able to use this link to review the quote and place the order from your online cart.
The replacements will have a length of 26-5/8" for the metal channel.
Please don't hesitate to reach out with any questions you may have.
They are custom for a number of different factors. As you pointed out, the length of them is one of those factors; a standard balance would be made in a whole number increment. The other details that make this a custom assembly are the wheel built in to the shoe and the clip attached to it. Overall, it as a completely different assembly from any other balance we have.
The reason we ask to see the photos is so that we can provide you with a configuration that will be an exact replacement for the one you have. I can assure you the replacement balance will be compatible with your window.
We recommend these balances quite often and our senior experts have even installed a few in their own windows.
I hope this helps!
Thanks again.