The MOR-71-4-KIT is a rear post kit for the MOR-71 rack that adds on two rear rails. The 4th post kit provides the highest overall rack stability and enables convenient wiring for the best professional look and function. The kit also features additional rear posts to provide easy mounting of power strips and other accessories. The rear post kit is solidly constructed of heavy-duty steel with a scratch-resistant baked on black paint finish that provides years of durability.