VTR TR-573 Brass Commercial 4-3/8" Valve Stem (2 Pack) Quality TR573 4-3/8" commercial vehicle valve stem (2 pacK) Comes with all fittings, valve core, valve cap, and grommets. Effective length of 4-3/8". For use on commercial vehicle wheels with a rim hole of 5/8" with a drop center. Brass construction with nickel plated valve cap.