Intended to replicate the shape of an actual .30 caliber army surplus ammo can. Molded out of rugged polypropylene plastic with thick sidewalls and a sturdy bottom. Heavy-duty latching system. Double padlock tabbed. Molded-in stacking ridges. Water-resistant O-ring seal. Inside dimensions in inches: 3.4Lx8.9Wx6.1H. Outside dimensions in inches: 5Lx11.3Wx7.2H.