24 Long * Can be used with either standard arm or desk arm wheelchairs * Double notches allow the board to be used on either the right side or left side of the wheelchair * Constructed of plywood and finished with a smooth lacquered finish * The 24 board has one built-in handle while the 29 board has two built in handles * � thickness * Notch designed to fit into up-right of wheelchair arm for added security during transfer * Supports up to 300 lbs *