This is 1/4 of a dryer extension for the Nesco 1010, 1040. Great for using your dehydrator to dry filament. Obviously just print 4 of them from PETG, ABS, ASA, or some other higher-temp filament, as PLA has too low a glass transition temperature for the heat this dryer produces. The small ears on the end of the model break off easily and just aid in keeping the model adhered to the build plate, and keeping the corners intact. Locating dowels to aid in assembly. Minimum build plate size is 235x235, perfect for your Ender 3 or clone!