Ricardo Beverly Hills Mar Vista 21-Inch 4 Wheel Expandable Wheelaboard, Graphite, One Size Lightweight polycarbonate hardside shells provide superior protection for your belongings. Oversized double spinner wheel system with 360 degree mobility minimizes effort and strain on arms, shoulders and back. Ergonomically designed handle system features TPR grips that fit comfortably in your hand. Multi-stage locking pull handle system adjusts to the most comfortable height for you. Elastic tie-down straps help keep items in place as you travel. Split-book style opening provides two large packing compartments. 10 year limited warranty 21x15x10