Bob from SWISCO responded:
September 3, 2023
Thanks for posting. How does the 39-351 9-5/8" Left-Handed Pella Hinge Assembly compare? See the diagram below. These hinge sets come with both the upper and low hinge bars; we recommend replacing both just to ensure the window continues to run smoothly. Let me know if you think this is right for you, or if you have further questions. Alternate image for 39-351
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