Pistol Dispenser Automatic Shut-Off Fuel Petrol/Gasoline/Diesel Oil Filling Gun

Test whether the oil gun self-sealing is effective there is a trick, people know, I want to share with friends I hope we can learn to judge: the oil gun switch buckled to any one file, have fingers coverthe the muzzle of the self-sealed small mouth, and then use (mouth / mouth) to seal the oil gun, pump / take a breath, the gun switch immediately jump off, there is a very clear sound "click", explain the self-styled normal, other speed test.

Gun body: aluminum alloy seal: fluoroelastomer and oil-resistant butanic rubber

Use media: gasoline, diesel, kerosene, etc.