This safe well-balanced cot-storage system is ideal for all sizes of rest mats. Lightweight snap-together plastic fittings and pipes ensure sturdiness. Eight nylon casters (4 w/locks) snap into place to provide effortless movement. Stores up to 42, 1" or 21, 2" mats. Easy to assemble. Measures 51"L x 27"W x 48"H.