The 3I-2015-MC24 case is the largest mic case and holds (24) mics vertically. It includes a large accessory section to store cables, mic clips, direct boxes, and more. 3i Series injection molded waterproof cases are constructed of ultra high-strength polypropylene copolymer resin and feature a gasket-sealed, waterproof and airtight, submersible design (IP67) that is resistant to corrosion and impact damage. Its continuous molded-in hinge, patented "trigger release" latch system, comfortable, snap-down rubber over-molded cushion grip handle, secure stacking, and automatic ambient pressure equalization valve (MIL-STD-648C) all contribute to its military grade design.

The 2i-2015-MC24 also features an injection molded pull handle along with in-line skate wheels.