window doesn't stay open and is so hard to lifting
Hello! We can help but we'll need you to remove an undamaged balance with the end attachments intact to compare to our inventory.
I'm afraid I can't make out your top and bottom nylon fittings clearly. Could you upload some pictures of your top and bottom fittings from a different angle?
Thank you so much!
Hi there!
Thank you for the additional photos!
It looks like you have our Series 350 channel balance. You'll also need to remove and weigh your sash to choose the appropriate stamp option. There's a chart on the Series 350's product page that shows you which option you'll need based on the weight of your sash.
If you have any other questions just let us know.