Uniweld 92838 Valve Core Removal/Installer Tool with 1/4" Side Port Fitting, Vacuum Rated 20 Microns Vacuum rated to 20 microns Attach electronic micron vacuum gauge to 1/4 inch side port fitting and isolate the system for greater accuracy Remove and replace damaged leaking valve cores from a 1/4 inch male flare access fitting without losing system refrigerant Remove valve cores for unrestricted flow for faster recovery, evacuation, and refrigerant charging of system Made in the USA