Tire inflation extension tube: It can quickly connect and disconnect the tire nozzle to ensure that the air pressure in the tire does not leak when the tire is inflated and disconnected. Wide range of applications: Universal type is suitable for all car air pumps; suitable for American tire valves for cars, motorcycles, bicycles Easy to install and use: connect the male threaded interface to the air pump and quickly press the handle of the inflator chuck to start the inflation. Valve extension hose material: Reinforced rubber hose with nylon coating, which is strong and durable and can withstand pressure up to 300 psi. Universal male thread interface: American 5/16-30 thread specification is the same as American tire valve, 8V1 valve, outer diameter 7.8mm.