Tough, maintenance-free ABS-plastic won't bend, rust, fade, or chip. Six heavy-duty ball-bearing 3" dia casters move easily in any direction, won't mar floors. Holds mats of all shapes and sizes, fits easily through doorways. Folds so it requires only 22" x 7" of floor space for storage. Supports up to 400 lb. Some assembly required. 66"L x 22"W x 7"H base; 38"H handle.