【12 Pack】Mobee Dry Erase Marker Black, Ultra-Clean Washable Whiteboard Marker - Refillable Design, Fine Point Dry Erase Marker Set/Fat Bulk Marker for Whiteboards, Glass and Most Non-Porous Surfaces

So far I seem to like this much better that other dry erase markers. I haven't had to refill one yet - Will try to update if problems.

They worked great! Used them for a class project and they were perfect for the students to use.