... wheel for choice 4.folds easily for storage Aluminum super light-weight protable pet trolleyFeature:play the roles of luggage ... ,with the help of this fantastic powerful trolleyEntire Aluminum frame,super light-weighted but strong,easy to clean and sterilize, ... .0022.00107 223KB-513AATAir Wheel, Aluminum Board, Two Doors121.7623.76107 223 Aluminum super light-weight protable pet trolley KB-511NAF