Working pressure is derived from the electric or air powered tool.3-way loading: 14 oz. cartridge / bulk / dispenser. Product features SKU JEFUNIPCPGR Capacity 14 oz. cartridge / bulk / dispenser Operating Pressure 4000psi / 275bar / 27.5MPa Max. Operating Pressure 8000psi / 552bar / 55.2Mpa Gross Weight 1.88 kgsFully automatic, cycles continuous lubricating grease flow to the power tool during operation.Equipped with high pressure relief safety valve for user protection and durability.Heavy duty aluminium construction supporting high working pressures between 4000-8000 psi.