PMF: Brass 500psi V4N Valve with pressure side paypass installed. •Specialized valve for certain PMF tools Used on most hand tools that have a built in Hide-a-hose. •Forged brass body •Stainless steel valve stem. This valve is the replacement valve for the Hydro-Kinetic wand among several other tools Also marketed under part number Esteam 538-090 Repair kit listed below: Producton Metal Forming RV4N PMF: Repair Kit for V4N Valve