single hung window channel balance
I'm not sure what you have, unfortunately. We have dozens of different balances with that stamp. It's not a product code or anything, it just indicates the strength of the spring.
In order to figure out what Series this is, I need you to remove an undamaged version of this balance from the window and show me clear pictures of the top and bottom nylon fittings. I will also need to know the dimensions of these fittings.
Thanks!
Thanks for your photos. Based on what I see here, you have either our S351-21 or S390-21, depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match. You will need an undamaged version of this balance to use as a reference.
As for the piece that holds it in place, it sounds like you're referring to the top sash guide. We should be bale to help with that, as well, but I need to see one removed and in undamaged condition. I specifically need to see it from the front and side (like a mug shot).
