This is a 45 RPM Vinyl Record Adapter designed in Fusion 360. Tapered at the top to ease dropping the record, and high enough to hold two or three at a time. I made mine on an Ender 3 using PLA at 0.20mm layer height, 195C nozzle, 55C bed, 80mm/s, 0.20mm elephant foot reduction in first layer.
The author marked this model as their own original creation.