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"x1.5"x4.5" All SKB iSeries Injection Molded Mil-Standard Waterproof Cases are molded of ultra high-strength polypropylene copolymer resin, and feature a gasket-sealed, water and dust tight, submersible design (MIL-C-4150J / IP67). Other standard features include a molded-in hinge, patented trigger release latch system, comfortable, snap-down rubber over-molded cushion grip handle, automatic ambient pressure equalization valve (MIL-STD-648C), and resistance to UV, solvents, corrosion, fungus and impact damage (MIL-STD-810F).