Geo Matt® Therapeutic Overlay Without Soft Skin®, 1 Each Humidifiers and Nebulizers Designed for continuous operation and Select Ear:Left Ear Designed for continuous operation and it is not necessary to disconnect the warmer when not in use 29 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 * Notch designed to fit into up right of wheelchair arm for added security during transfer * Supports up to 300 lbs * and lower extremities weight limit