4-In-1 ball Valve tool is perfect for vacuum, charge, cores and recovery. Remove and replace Schrader cores without losing charge. This versatile tool for the lo- or Hi- side of a system does four jobs: vacuum Valve. Extra 1/4 inch side port on the 18975 to attach electronic micron vacuum right at the system for greater accuracy or to add refrigerants. Working pressure of 800 removal access. Lets you evacuate and charge through an unrestricted line for increased speed and higher vacuum. Core replacement. Recovery Valve. Core removal allows recovery unit to work at maximum efficiency, speeding the recovery process. Product manuals English manual. made in United States. Manufactured by Ritchie engineering Co.