Travelpro Crew 10 Slim Body Rollaboard (One size, Black) High performance sealed ball bearing wheels have been tested to ensure the smoothest of rolls. Patented PowerScope aluminum extension handle minimizes wobble and has multiple stops at 38 and 42.5. Ergonomic handle grip with TPR touch points fits comfortably in palm of hand. High quality nylon fabric with Duraguard coating provides ultimate durability. SUPRA Zippers Heads have been reinforced to ensure they work reliably over the long haul.