This is a used pneumatic Nor-Cal angle vacuum valves model 980315-1 with pressure reducing restriction built-in, formerly part of a residual gas analyzer (RGA) system. The pressure reducing path in the valve contains a micro-hole orifice which is designed to operate at an incoming pressure of 100 mTorr. It reduces the incoming pressure to the high-vacuum operating pressure of the RGA (about 10-6 Torr) at the output. Please see photos for actual condition of item. This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Vacuum Pumps\Other Vacuum Pumps". The seller is "eckart1" and is located in this country: US.