13pcs valve extender, with three angles of 45 degrees, 90 degrees and 135 degrees, and is equipped with rubber seals to ensure air tightness without leakage. 2Made of high quality brass, chromeplated surface, equipped with metal dust cover, durable and long service life. 3Easy to install, screw the adapter screw to the tire valve, and the bottom of the extender can rotate freely for easy operation, extending the service life of the original tire valve screw. 4The threaded head on the valve extender is screwed on the existing valve stem, and the included end cap replaces the existing valve stem cover. 5Solved the problem of unable to pump air or check air pressure. Due to the builtin valve core, it can allow inflation and deflation, which is convenient and fast. 6Suitable for most bicycles, motorcycles, trailers, motorhomes with standard American tire valves.