Need help clarifying what to order :)

Thanks for contacting us. All of our balances come with top and bottom nylon fittings installed already. They're pre-assembled and ready to install out of the box. I'm just not sure what you have. Can you show me one clear photo of the top nylon fitting and one clear photo of the bottom nylon fitting? That will allow us to narrow down the Series.

When you say sash, do you mean the top sash guide in your last two photos? A sash is the square glass panel that you raise and lower. I ask this because you say that your windows don't have lower sashes, which would definitely be a big deal.

If you need top sash guides, see our 18-039. This looks like yours, though it's not available in black. You should have these on all sashes.

Perfect, thank you! These are a huge help. I was able to narrow this balance down to two possible choices: our Series 351 or our Series 390. The only difference between these balances is the depth of the bottom nylon fitting; the Series 351 comes with the 15-002, which is 1" deep, and the Series 390 comes with the 15-001, which is 1-1/8" deep.

When I say depth, you can think of this as the "heel to toe" measurement, assuming the balance is standing straight up like it is while installed.

In that case, take a look at our Series 390 channel balance to see if this would make a better option on a replacement.