This knob replaces the knob at the end of the lever arm for an unknown series of Pella casement windows. Mine were starting to heavily wear (as the most recent in likely a long line of tenants to use them) and some had stripped threads.
The threaded portion demands a relatively small layer height. I was able to get good results out of 0.12mm on a Bambu P1S, where 0.2mm was failing to accurately print the thread profile. The thread is a 7/16"-20 UTS thread.
The author marked this model as their own original creation.