Universal Wheelchair Arm Tray. Plastic arm tray attaches to a base that slides on upholstered armrest. Fits standard and desk arm chairs on right or left. Includes 3.2mm Kushionflex pad for comfort and protection. Modified Universal Wheelchair Arm Tray has a cutaway base allowing access to brakes. (Original design courtesy of the Occupational Therapy Dept., Kaiser Foundation Rehabilitation Centre in Vallejo, California).