Vertical holder for 19mm shelf

This is a very simple holder for 19mm standard shelf boards to hold it upright. I use the standard IKEA board for Pax wardrobes (100cm width) as a room separator to keep our dog out of areas he should not enter (i.e. childrens' rooms, bathrooms etc.). I use two holders per board. See attached photo.

I have uploaded a revised version without the small void on the bottom - with this, there was too much local strain leading to breakage.

I also uploaded the bgcode for Prusa Mini with input shaper - PLA runs @ 215°C.

I printed in PLA, 2 walls, 15% grid infill and a modifier at the bottom with 30% honeycomb infill to make it stiffer.