Comfortable one-hand operated Grease Gun designed for use in confined spaces or where access to grease nipples is restricted. Features aluminum die cast head with bulk loader and air bleeder valve, plated handle, plus non-slip powder coated finish. Includes 4'' ( 100mm ) steel extension and 4-jaw coupler with ball check . Capacity :14oz(400gm) grease cartridge or 500cm cube bulk fill. 1/8'' NPT threads . 5 ,000 PSI