Large Shock Rack Shiping Case…..Cabbage Case can manufacturer your rack case in up to a 36U size. Each rack U (unit) is 1.75 inches of rackable height. A taller rack case will typically have casters on the bottom of the case and on the rear lid, so the rack can be laid on it’s back to eliminate tipping when transportng due to it’s height. 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.