PROLUBE 43002 PISTOL GRIP GREASE GUN, WITH EXTENSION AND COUPLER, 14 OZ. CAP., 5000 PSI, 1/8″ NPT DESIGNED FOR USE IN CONFINED SPACES OR WHERE ACCESS TO GREASE NIPPLE IS RESTRICTED. BUILT TOUGH, ROBUST BARREL THAT IS 0.049″ (1.2 MM) THICK; HEAVY DUTY FOLLOWER SPRING, CNC MACHINED GREASE GUN HEAD, LARGE ROLLED THREADS FOR FAST & EASY RE-LOADING. HEAVY DUTY ALUMINUM DIE CAST HEAD & SUPER STRONG PISTOL GRIP HANDLE. PISTOL HANDLE DESIGNED TO PREVENT FINGERS FROM “PINCHING”, DEVELOPS 5,000 PSI / 345 BAR. INCLUDED IS 4″ STEEL EXTENSION AND STANDARD 4 JAW COUPLER WITH BALL CHECK