See the label above

Hey there!

This appears to be a Simonton brand window based on the sticker in your first photo. With that said, you can use the 15-259 pivot shoe and S159 coil balances. The video below will go over all the details you need to know.

Let me know if you have any questions!

This code doesn't tell us its weight. In that case, you'll have to weigh the window sash and divide the weight by the total number of springs. Feel free to get back to us with the sash weight and we can calculate what you'd need from there.