Lumax Brand Grease Gun Deluxe, Air Operated . Convenience of one-hand operation for easy greasing. Heavy-duty, die cast head for durability and long life 1/4" NPT Inlet. Outlet: 1/8" NPT working air pressure of 60-90 PSI maximum operating pressure: 3,000 PSI (205 Bar). Handy 3-way loading - fill with standard cartridge, suction or bulk fill. Fully chrome plated finish for protection against corrosion. Equipped with air bleeder valve to release trapped air. Includes Filler Nipple with ball check for use with grease filler pump. Full-molded follower for superior seal and eliminates grease bypass. Heavy-duty follower spring for consistent priming. Heavy gauge steel barrel with wide band, non-slip knurling. Posi-lock follower rod with ergonomically designed T-handle for easy filling at any position. Four jaws hydraulic coupler, non-drip cap, 6" (150 mm) extension pipe and 12" (300 mm) grease hose.