Featuring high quality form-cut PE foam designed specifically to house the Universal Audio OX Amp Top Box, the 3i-1813-7OX case interior also includes a pocket for power cables and other accessories which measures 10" x 1.5" x 4.5". SKB iSeries Injection Molded Mil-Standard Waterproof Cases are molded of ultra high-strength polypropylene copolymer resin, featuring a gasket-sealed, water and dust tight, submersible design (MIL-STD 810G) that is resistant to corrosion and impact damage. Standard features include a molded-in hinge, padlock loops, patented trigger release latches, snap-down rubber over-molded cushion grip handle, automatic ambient pressure equalization valve (MIL-STD 810G), and resistance to UV, solvents, corrosion, fungus and impact damage (MIL-STD 810G).