Sold as 1 Each. Raises monitor 6, 7 or 8'. Supports up to 35lbs. Perforated holes for passive airflow-keeps temperature down for sensitive electronics. Outer Dimensions: 14.75' W x 11' D x 4.25' H. Stores a cable box, Blu-ray(tm) player or keyboard under platform. Platform Dimensions: 14.0' W x 9.0' D. Easy to use no assembly required.