window balance

Thanks for your photos. Based on what I see here, you have either our S380-30 or S385-30, 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.

As for stamp, it's actually very critical. Based on your old stamp of "29-5" you should have the 2950 option. If you have any doubts, you can always weigh your sash on a scale and review our balance weight charts to verify. You can see this on each balance's store page.

Comparison of the S378, S380 and S385 balance shoes.