Extra-strong carts are made of 1-1/4" steel tubing with added welding for long-lasting performance. Pressure sensitive hinge safely holds lid open at any angle, while integrated locking system with key ensures the teacher remains in control of the cart at all times. Carts feature four 4" dia ball-bearing swivel casters, two locking. Choose Full-Size for greater capacity (holds 24 official basketballs) or Max with a double-lid and center interior divider for dual-purpose storage that still fits through doorways (holds 40 official basketballs). Assembly required. Truck delivery on Max carts.