Closed, it meets airline carry-on requirements. Opened, its unique rear wheel assembly provides stability, supports large loads and stair glides. Folds up flush to storage or for climbing steps. Brakes on rear wheels and spring locks assure worry-free use. Features include: Cart: 400 lbs. capacity; Open dimensions: 52"H x 16-1/2"W x 31"D; Load tray dimensions: 16"H x 12-3/4"W; Wheelbase: 15"; 3" rear wheels; Weight: 19 lbs. Lifetime warranty.