Whiteboard Marker Holder (12mm magnets; snap-in)

thingiverse

This is a custom design based on a standard 3x whiteboard marker holder from Expo. The original holder's unique wall structure allows Expo markers to snap into place perfectly, utilizing three walls for secure retention. To enhance the holding power further, I opted to replace the traditional 3x8mm magnets with two larger 2x12mm magnets per hole. Additionally, this revised version includes a dedicated slot for my 12mm magnets.