Very Light Proprietary Hpx2 Polymer Optimized For Air Travel Tough Double-throw Latches Automatic Purge Valve Balances Air Pressure Watertight O-ring Gasket Conic Curve Lid Shape Drop-tested On Concrete With Loads From 6ft On All Sides & Corners Submerged For 30 Min At A Depth Of 3.3ft Crushproof & Dustproof Stainless Steel Hasp Protectors Rubber Overmolded Handles Durable Quiet Rolling Stainless Steel Bearing Wheels Extending Trolley Handle Maximum Airline Check-in Size Removable Polycarbonate Cardholder With Front Or Side Placement Model 1615 Internal Dim: 29.59"h X 15.5"w X 9.38"d External Dim: 32.58"h X 18.4"w X 11.02"d