This is a PETG frame designed to hold 1/9th steam pans for use as a removable and dishwashable grease bucket/grease trap on pellet smokers like a Trager or Pit Boss. Uses 10 or 12 gauge wire fitted in the side holes. You can place #4-40 screws in the corners if you want more airspace between the frame and the stainless steel pan but grease bucket is exposed to ambient air and doesn't seem to get hot enough to affect the PETG.
Part designed in FreeCad
1/9th Steam Pan:
https://www.amazon.com/Winco-SPN4-Size-Steam-4-Inch/dp/B001VZERUW
The author hasn't provided the model origin yet.