The bigger the printer the better but if you have a smaller printer like me, make sure the pieces are the right size.

How to assemble: align the door hinges with the box hinges. Slide the long pole through the hole in the top of the box. Then seal the top with the little piece. You might have to sand it. Place the mechanism in the hole of the door with the star piece coming out the outside of the box. Now it is done. Use the key wheel to spin the mechanism which will unlock it.