The Sternum Magnet Kit allows you to make your pack compatible with any HydraForm??? Reservoir. Simply connect the Hydraulics??? hose magnets to the sternum strap on your pack for hands free hydration. . ??. . . . . . Makes any pack HydraForm??? Reservoir compatible. . 3 pack. . Detachable. . Imported. . 845136004818 29096300006 334224