This listing is for one Brand New Sherwood line valve.  It is rated for 6000psi.  The inlet is 1/4" NPT female, and the outlet is 1/4" NPT male.  This is the most popular valve of this type on the planet.  Personally, I absolutely love them.  They last forever, never leak, and are completely rebuildable.  Perfect for any high pressure SCUBA or Paintball use.  Ideal for use as a fill valve on a fill station.