Heavy Duty Lever Action Grease Gun with 6" Rigid Extension and 4 Jaw Coupler with Ball Check. Made in The USA. Cartridge Capacity: 14 oz. Bulk Capacity: 16 oz. Stroke Delivery: 1 oz. / 28 strokes Maximum Pressure 10,000 PSI Features: Heavy duty powder coated barrel, heavy duty follower spring, cast aluminum head with a bulk loader & bleeder valve, soft rubber grip, and variable stroke lever for use in confined areas.Variable stroke lever allows higher greasing pressures from short strokes or high greasing volumes with full strokes.