CAT C5Ltw Nested 3-Pack, Black, One Size Strong and lightweight ripstop body fabric combined with custom engineered hardware 4-wheel spinner system on the 28 inch and 24 inch trolleys allow for smooth and effortless movement 20 inch trolley features two wheels 20 inch trolley: 5.5 x 19.7 x 7.9 inches; 24 inch trolley: 16.4 x 23.2 x 10.2 inches; 28 inch trolley: 18.1 x 27.6 x 11.1 inches Tie-down straps to secure belongings