Eken H9 is a cheap camera but having it protected a little bit feels good.
Choose a lighter version with honeycomb cut out or stronger and solid plates.
Eken H9 cheap action camera on Banggood: https://goo.gl/NvnD6N
Version 1.1 (19-12-2016)
Pressed the thick edge of the lens protector a bit back. Now it has a total depth of 7,5mm and you don't see that glowing edge of the plastic in you footage...
I also included a thicker back plate. Now you can choose to print a 2mm or a 3mm version. It only has to protect the display.