2820 window balance guides

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.

I have not received photos from you, unfortunately. You will need to upload them directly to this page, where you and I are talking right now. Once I can see them, I can get to work.

Based on your photos, you have either our S380-29 or S385-29. The only difference between them is the size of the bottom fitting, which is indicated on their respective store pages. You'll need to measure your bottom fitting to confirm which one is the better match.

Comparison of the S378, S380 and S385 balance shoes.

If you mean that the shoe depth is 1", then it seems like you need an S380-29 with a stamp option of 2820. Let us know if you have any other questions. 

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