Features: 1.Tire Inflator Hose Adapter: designed for tire inflator hose converting, easily convert tire inflator's twist-on connection to lock-on connection. Screw adapter end onto original inflator hose, press to clamp adapter head onto tire valve, start the inflator for a quickly and none leaking inflation. 2.Suitable For: All metal construction air chuck, portable tire inflator chuck adapter, for bike, motorcycle, car air fill. 3.Seal: Excellent tight seal lock-on air chuck, make sure no annoying air leaking. 4.Standard: Standard us fine thread connection (5/16x32TPI), the same as the thread on all USA standard car valve stems, compatible with inner thread of twist-on air chuck. 5. 3 Sizes to choose: (Approx) (L) 10cm/20cm/60cm (3.93in/7.87in/23.6in). Specifications: Material: all metal air chuck+rubber hose+brass connection fitting Color: black Connection thread: 0.305"x32TPI (5/16"x32TPI) Connection type: Self-locking Outer diameter: Approx 7.6 mm/0.3inch Size: (Approx) (L) 10cm/20cm/60cm (3.93in/7.87in/23.6in) Package Included: 1 PC x Extension Tube Instructions: 1. Connect the external thread to the outlet nozzle of the air pump 2. Connect the quick connect inflation chuck to the tire mouth