Atrium Window Balance

Thanks for reaching out to us. I agree that the Series 395 looks good in terms of your combination of nylon fittings; it comes with a 19-005 top and 15-001 bottom, so as long as those match up then this is the correct Series.

I'm confused when you say that you have no stamp, though. I see a stamp in your first photo, which is a collage. Is that not your balance? If not, then you'll need to weigh your sash on a scale and refer to the chart on the S395-28 store page to confirm the best option. That chart tells you exactly how much weight each option supports.

The 27-4 matches our 2740 stamp option, yes. Just keep in mind the stamp is not a product code; it only indicates the calibration of the spring. The only way to identify the Series is to go by the design and size of the top and bottom nylon fittings. As long as yours match our 19-005 top and 15-001 bottom, then the Series 395 is the best choice.