18" x 36" x 80" Mobile solid shelf stem caster carts are an easy way to transport fluids and small packaged items. The solid shelves on cart prevents dust and other contaminants lifted off the ground from entering below while the unit is in transit. Unit consists of 4 - posts, 4 - solid shelves, 4 - donut bumpers and 4 - 5" poly stem casters, 2 with brakes.