Pella part

Hello,

You can start by comparing our 39-396 and 39-394 Pella hinges to yours, depending on the size that you need. Take a look at these and the other Pella hinges to make sure you get the one you need. Thank you!

It's possible that your hinge set was an earlier version and the newer hinges are set up differently. However, if you were to replace both hinges as a set they should work fine. The only thing that might happen is the window might not open up as far. Also, take a look at the longer hinge sets the 39-396 and 39-397. Maybe the arms would line up better compare to your original hinges.