Indestructible tool case with injected copolymer polypropylene structural resin 60x20 wheels on ball bearings for easy transport even when very loaded Reinforced angles and ribs for maximum protection Corrosion, water and dust proof - all parts are Skydrol resistant Extremely resistant to very low and high temperature: -33º to 90º Airtight PU injected O-ring seal Manual air pressure valve Stainless steel pins Integrated identification/name badge Padlockable Interstackable 1 retractable handle for when rolling on wheels 1 rubber coated heavy duty handle 2 closing latches, 4 bottom studs Empty case