1. Valve extension set: package includes 1 x tyre filling hose and 2 x car valve adapters. Car inflator hose total length of 40 cm, valve connection size is 8 mm and the brass connection size is 7.6 mm. Adapter car valve size: length 29 mm, interface 8 mm. 2. quality materialsOur tyre inflator hose adapter consists of a pressureresistant braided outer hose and the lever plug car valve is made of durable brass with chromeplated surface. 3. Easy InstallationOur set is easy to install. Simply screw one end of the compressor hose to the inflator and the other end to the air chuck of the tyre valve. After inflation, you can easily deflate the air by tightening the air nozzle on the pump port. 4. Robust structureOur portable tyre inflator hose adapter has an American standard fine thread design (5/16' x 32TPI), which can quickly connect and disconnect the tyre mouth to ensure that the air pressure in the tyre does not leak.