QuikStem QS-430 Push In Valve Stem. Fits .453 valve hole. Will replace broken valve stems on lawn & garden, farm equipment, construction vehicles and more. Designed to install from outside of wheel to reduce vehicle down time and allow you to continue working until tire service is convenient. Can be installed with a 1/2" socket or wrench. Installs easily in 1 minute. 1-3/16" Long.