Meet the toughest grease guns around. Plews/LubriMatic grease guns are constructed of heavy duty steel and finished in rugged baked enamel or tough zinc plate. Continuously pumps grease while trigger is depressed. Delivers up t 6,000 PSI. Head cap port for adding air bleeder valve or bulk loader fitting. Capable of 3-way loading: 14 oz. cartridge, bulk or suction. Recommended inlet pressure - 90 PSI. Dispenses 5 oz. per minute.