Allstar ALL44136 Rubber Snap-In Style Valve Stem for Racing Wheels, (Pack of 4) Valve stems are constructed from rubber and are a snap-in style Designed to fit .625 inch hole for racing wheels and these economical rubber valve stems pull through the wheel for easy installation The large stem designed for 5/8 inch holes is the most popular size valve stem used in racing wheels Sold as one set of 4 pieces Backed by a 90-day limited factory warranty