Feature:1.Convert a Presta valve to a Schrader valve - suitable for varied types of bikes, including mountain bike, roadbike, folding bike, especially for mountain bikes.2.Prevent leakage, dirt and rain water to extend the service life of bike tires.3.Rocket shape makes the bike look more attractive and special.4.Best replacement for your old or broken one.5.Direct replacement,easy to install, only use the wrench to put the caps onto the tire valve stem.This item help to convert a Presta valve to a Schrader valve. It is suitable for varied types of bikes, including mountain bike, roadbike, folding bike, especially for mountain bikes. Prevent leakage, dirt and rain water to extend the service life of bike tires. It is the best replacement for your old or broken one.- Material: Aluminium alloy.- Size: 1.5x0.95x0.95cm / 0.6x0.4x0.4inch(LxWxH).- Also turn a UK valve into a US valve.- To tire valve mouth design, filar silk closely, gently turn only.Package Including 4Pcs *Car Valve Adapter