Alemite’s high-volume grease gun can develop up to 1,800 psi. It loads in one of three ways – cartridge, suction, or loader pump. Features include a heavy-duty lever with vinyl grip, loader fitting and clean-out check. It delivers 1 oz. with 7 strokes. This particular model (#4015-B4) has a 24-oz. capacity, and includes a rigid extension and coupler.