Expanded Metal on 3 sides extends 48 in. high above deck to help contain loads and improve visibility and airflow. Shelf is adjustable on 3-1/2 in. centers for versatility, and can be positioned with 1-1/2 in. lips either up or down. Shelves are 12 gauge steel. 6 in. x 2 in. casters, 2 swivel, 2 rigid. Overall height is 57 in. Capacity is 3,600 lbs.