Glass is the finest dry erase surface available today. It never ghosts cleans easily and is perfect for extensive use. The opaque magnetic surface allows you to use the surface for posting or writing. All of the mounting hardware is on the back of the board providing seamless and clean aesthetics. Without crevices or nooks that marker residue can collect in it looks new for a lifetime. The metal pen tray is included along with all mounting hardware. The 4mm tempered glass surface is compatible with high-intensity magnets. Works with wet-erase and dry erase markers.