Adjustable stroke for changing pressure build up from 4500 PSI in pistol mode to 7000 PSI in lever mode;Variable grease discharge from 1 oz. per 40 strokes to 1 oz. per 22 strokes;Includes 6″ Steel Extension, 18″ flexible grease hose & coupler;Barrel with 0.049” (1.2 mm) wall thickness;Aluminum die cast head fitted with bulk loader & air bleeder valve;Non-slip comfortable vinyl grip handle;For use with 14 oz. Grease cartridge or 500 cc Bulk Fill;Max. air pressure to 100 PSI (7 BAR)