Rack Shipping cases will protect your gear from the bumps and bruises received in shipping. Cabbage rack shipping cases can be manufactured in 1/4, 3/8, or 1/2 inch construction depending on size and weight of content. Rack Shipping cases can be shock-mounted or standard (non shock-mounted). Rack shipping cases can be manufactured from 2U to 42 U in any depth you need. Every rack "U" is 1.75 inches of vertical rackable space.