Milton (S-3101) Pistol Grease Gun - High Pressure, High Volume. Milton's S-3101 Pistol Grease Gun and 18" High Pressure Hose Extension air bundle kit offers a handy and convenient solution for home garages to professional workshops, automotive, industrial, farming/agricultural, and other application needs. With an 18-inch high pressure grease gun hose crafted for those hard-to-reach spots combined with a bonus coupler, this tool allows you to check off projects quickly and efficiently. Fill this grease gun with either standard 14-ounce grease cartridges, bulk fill or dispenser/filler pumps. Maximum pressure of 7,000 PSI.