The MGB3040 is a Mobile Glass Marker Board which has tempered 5/16in. ( 8mm ) thick glass. Glass is the ideal surface for wet/dry erase markers. They will not stain or ghost. Silver finish on Steel frame. Comes with 4 locking non-marring grip swivel casters for easy mobility. 30in.W x 40in. H Board size. 35in.W x 68in.H x 24in.D Frame size. The lock and pivot system allows the glass to tilt up to 8 degrees in each direction. Includes a Magnetic Marker Caddy. Comes with a Lifetime warranty.