This hatch was made with PLA Dimensions: width 15 cm x length 15 cm x height 12 cm You have to add a spring (see photo for dimension) I got them via Amazon Assembly:

1. Take the bottom, put the pallet (or insert) on it put 2 studs and glue them with a minimum of glue for PLA.
2. Place the 4 bars and glue them with PLA glue
3. Take the roof and fix the door, attach the spring with the 2 glue-on studs
4. Glue the roof to the bottom.
5. Take a 1 mm metal rod with a total length of 17.5 cm to pass through the hole in the roof provided for this purpose.
   Operation: Open the door and hang it with the metal rod, Inside the rod rests on the pallet. The slightest movement on the pallet will trigger the mechanism PS: the studs must be adapted to the assembly, for this you must increase or decrease the print size because it depends from one machine to another.

Name print supports comment filling

Bars 4 X NO 30% Bottom 1 X NO 30% Top 1 X NO 30% Studs 1 X NO 30% Insert 1 X YES only on the board 30% door 1 X YES only on the board 30%