Tire inflation extension tube: can quickly connect and disconnect the tire valve to ensure that the air pressure in the tire does not leak when the tire is inflated and disconnected. Wide scope of application: universal type suitable for all car air pumps; suitable for car, motorcycle and bicycle tire valves. Easy to install and use: connect the external threaded interface to the air pump and quickly press the handle of the inflation chuck to start inflation. Valve extension hose material: reinforced rubber hose with nylon coating, strong and durable, can withstand pressure up to 300 psi. Universal external thread interface: thread specification 5/16-30, valve 8V1, outer diameter 7.8mm