The Mission Magnum Pumps and Stuffing Box are rated for continuous service in applications up to 200 hp and are available in Hard Iron, Stainless Steel, Aluminum Bronze, and High Chrome. An easily removable stuffing box allows these pumps to be customized to meet customer needs. The different options available are stuffing boxes to accommodate: â?¢ Shaft packing â?¢ Single mechanical seal The packed box has a tapped opening to the lantern ring to allow grease lubrication or a flush line to be attached. Dual stuffing box bolts are positioned 180 degrees apart to hold the stuffing box in position during casing removal. When only one stuffing box bolt is used the stuffing box remains in position on one side while the other side moves with the casing, causing the casing to bind and make removal difficult.