Repositionable, Static Cling Dry Erase Polar Graph features a dry-erase that "clings" by static to most smooth, flat surfaces without adhesive! Perfect for use on whiteboards and windows. Repositionable and reusable—leaves no residue behind! 24" wide x 24" high size is ideal for demonstrations or at-the-board work. Rolls up and stores compactly. Meridian rays make 15° central angles. Outer circle graduated in 5° units. Concentric circles are 2.25" apart. 20.25" diameter outer circle. Radians shown. Bold main axis.