Portable desktop sits on top of existing desks to get students out of their chairs and actively engaged in class. FitDesk® adjusts from 12"H to 16"H to comfortably fit a range of positions and user sizes, while padded rollers help promote proper posture and keep students comfortable. Steel frame with foam-covered legs stand securely and won't mar desktop. Lightweight, portable design allows for versatility or easy rotation between students or classrooms. 20"L x 17"W x 12"H; 10 lb.