Automatic operation with continuous grease discharge Supplied with 1/4" NPT(m) quick coupler fitting Ideal for use in factory maintenance, agricultural applications, fleet service or for use on trucks connected to vehicle air brake compressors 3-way Loading: cartridge, drum or bulk Heavy-duty aluminum die cast head with internal bore precision honed for rapid action Head fitted with bulk loader valve Ergonomic pistol grip and acute angle design Complete with 12" flexible hose and 6" steel extension with professional 4-jaw coupler For use with 14 oz. standard cartridges Specifications: Air Operating Range: 40 to 120 psi Pressure Ratio: 40:1 Air Compressor Volume: 1 CFM