Use 22" x 28" Markerboard Sign Panels with your Simpo II A Frame to show different messages daily! Pair these corrugated plastic sign blanks with our 5 Pack of Wet Erase Markers to make brightly colored custom signs daily! Use a marker board kit to feature daily specials, menus or other presentations indoors or out. Each kit includes (2) 22" x 28" corrugated plastic panels in either white or black. *SIMPOII Plastic A-frame sold separately.