The 30x40 Mobile Black Board with Markers is a must-have for any office or classroom.The 30x40 Mobile Black Board with Markers has a two sided gloss black magnetic surface. Aluminum frame around board. Wet erase neon markers are included. It comes with 2" casters two have locking brake. Knob adjustment locks the board in place. Easily wipes clean using soft cloth and glass cleaner. It comes with a 10 year warranty which does not include the markers. Aluminum.