Chrome finished steel, bolt-in, valve stem mounts in standard valve stem location and provides a clean semi-flush appearance. Valve stem features an o-ring to seal against the outside of the wheel and a rubber grommet, washer and nut that seals against the inside of the wheel. Kit includes four valve stems with dust covers and an extension filler tube. Valve stems are designed for use in wheels with.453 Inch valve stem holes. Details: Finish: Chrome Size: .453 Inch Valve Stem Holes Color: Chrome Material: Steel Mount Style: Bolt-In Sold As: Set of 4 Product Description: Valve Stem Bolt-On Flush Mount 1/2 in Rim Hole Steel Chrome Set of 4 Specialty items for the Shop, Trailer and Track. The Allstar Performance brand offers thousands of hard-to-find, specialty items that cover many segments in the performance aftermarket. For over 30 years, customers worldwide have come to rely on the quality, affordable and practical items available from Allstar Performance.