Quickfill with pressure gauge for Crosman Benjamin Marauder air rifles from the regulator manufacturer Huma. Quickfill Huma replaces the original plug with quickfill from the manufacturer at the end of the cartridge and thus allows you to more comfortably monitor the pressure during filling. Quickfill Huma is especially suitable when installing a regulator, when the original manometer shows the pressure of the regulator and not the pressure in the cartridge.