This OSP ATA microphone case hold up to 15 straight or ball top microphones and has extra storage space for accessories. This is an extremely solid and well designed case. Built with 3/8" plywood with black laminate, foam padding, heavy duty ball corners, industrial latches, spring-loaded handle and rubber feet. Compare to any other ATA case and you'll agree that OSP quality case are second-to-none. OSP cases are built to last.