Replacement part

Thanks for posting. Pella sliding doors can use weatherstripping like the 58-173, 58-181, and 58-055, among others. There is no way of knowing what you might need on these photos alone; you'll need to remove a sample and compare the 'end profile' with your old seal. See if any of these match up. Let me know what you find.

Profile view of 58-055

Profile diagram of 58-173

Profile view of 58-181