Non tilt window channel balance
We can help you find the replacement parts you need. We need to see the entire balance showing both nylon attachments. Could you send us some additional photos showing the entire balance?
Yes, thank you. I'd say you have either the Series 380 or Series 385, depending on the depth of the shoe. This would be the "heel to toe" measurement. If the depth is 1", you want our Series 380. If it's 1-3/32", you want our Series 385 instead.
Make sure to account for wear when you measure. What I mean by that is that the depth on your shoe may be a little less than it once was.
I'm sorry, I was so preoccupied by your pictures that I overlooked that part of your post. I had assumed these came out of two different windows. My apologies for the confusion!
What you can do is measure the height of the visible glass of the sash. The height of the visible glass should be 1" less than the length of the balance. I would wager it's either 28" or 29" tall. If it's 28", go with the 29" long balance. If it's 29", go with the 30" long balance.
Glad we could help! Let us know how it works out for you.