Gridfinity 1x1x1 Large Marker / Paint Pen Holder (17mm Chartpak AD)

1x1x1 Gridfinity Unit with 4x 17mm holes to fit Chartpak AD or similarly large ~17mm paint markers. This is probably the largest diameter hole you can fit in a 1x1 unit.

Slowly working through my drawer of art supplies, I believe I have a larger set of Chartpak ADs somewhere so I'll try to update this with larger models when I find them.

These extremely specific holes brought to you thanks to Gridfinity Hole Customizer by brian.kerle