The file 'Wall Mount Pen Holder With 2 Boxes 3D Printer Model' is (stl) file type, size is 4.2KB.
When I saw this model https://www.thingiverse.com/thing:33312 I tryed to add some things...
This model has two boxes to store things and a top compartment.
You need two M4 screws.
Print:1 x Pen holder2 x Box