6U hard case, made from ABS jet moulded plastic for 19 inch rack mountable equipment. Each case is stackable, have recessed heavy duty handles, and have detachable front & rear doors for easy access. They are super light, incredibly strong and sturdy. They also are designed to absorb vibration to protect and prolong the life of any equipment fixed inside. Comes with front & rear pre drilled rack strips and fixing screws.