Kuretake - Dry Erase Liquid Post Chalk Marker Pen - Blue
Unlike whiteboard markers that can erase only when used on whiteboards, these liquid chalk markers can erase from dozens of non-porous surfaces. Use these great markers to write on white boards, black dry erase boards, windows, mirrors, filing cabinets and more!
You can even make any poster into an erasable surface when you write with this chalk marker. Plus, your hands will never get dusty. Not suitable for chalk boards as marks may not erase cleanly from the porous surface.
They are dry erase and wipe clean with any cloth or paper towel.