Allstar Rubber Snap-In Style Valve Stem for Racing Wheels (Pack of 4) feature valve stems which are constructed from rubber and have a snap-in style. It is designed to fit a .625 inch hole for racing wheels. These economical rubber valve stems pull through the wheel for easy installation. The large stem is designed for a 5/8 inch hole and is the most popular size valve stem used in racing wheels. The smaller stem for .453 inches hole is commonly found in stock steel and utility vehicle wheels. It is sold as one set of 4 pieces. It is backed by a 90-day limited factory warranty.