Alemite 555-E Pistol Grip Grease Gun, Develops up to 7,500 psi, Delivery 1 oz./30 Strokes, 16 oz. Bulk or 14 oz. Cartridge, with Flexible Extension, Dual Leverage, Volume or Pressure Mode Develops pressure up to 7,500 psi Dual mode, pistol grip lever mechanism for high-volume output or high-pressure delivery Delivers 1 oz. of grease per 30 strokes under high-volume mode 16 oz. cylinder capacity Grease loaded through cartridge or bulk loading