This is heavy-duty, deluxe pistol grease gun with 18 inches flexible. This pistol style grease gun comes with a deluxe, oil-resistant, contoured grip for comfort and firm grip and has a chrome plated finish on the handle for maximum protection against corrosion. It comes complete with a heavy gauge steel barrel (18 gram / 1.3 millimeter) with a heavy-duty follower spring for consistent priming and a posi-lock follower rod with ergonomically designed T-handle which provides a sure-handed grip and easy filling at any position while the tough follower offers a superior seal and eliminates grease bypass. It provides an output of 4 ounce (115 gram) of grease per 100 strokes and comes complete with 18 inches (100 millimeter) extension pipe, four hardened jaws hydraulic coupler with ball check and non-drip cap. Do not hold whip hose while pumping the grease gun. You can replace damaged whip hose with 4500 PSI (310 bar) rated hose only.