Móc treo nhẹ gắn kệ kính

Simple design, quick print.  Should be able to scale it up or down on the printer bed pretty easily as required.  As designed it goes on a 9.6mm thick shelf.  Added a reinforced one for 5mm shelf

If you want them a little sturdier add to the z direction.  

Good to use up some leftover spool material.

Revised: Added Venus Razor holders

Revised: Added a reinforced hook for a 5mm shelf