These equipment cases are assembled with either 1/4" or 3/8" plywood with a thick plastic laminate on the outside and a carpet lining inside for reliable equipment protection. The case is surrounded with a heavy gauge aluminum extrusion and is machine split riveted together. Closure latches are recessed for protection and the handles are spring loaded for easy lifting. There is also a caster kit included to aid with the unit’s maximum mobility. Please note that installation is required for these casters. The approx inside dimensions of this supply trunk with wheels is 35 1/2" x 19 1/2" x 19 1/2" high.