Appion CCT5165/16in Female flare to 1/4in Male flareVacuum-Rated to 20 micronsMade from aircraft-grade aluminum for maximum durabilityDouble O-Ring design makes for unmatched reliability in high-pressure and a deep vacuum1/4in side port for gauge or hose connections5/16-inch Core Control ToolGain maximum control when depressing a valve core! This low-loss fitting depresses valve cores with ultimate precision, perfect for accurately charging AC systems or servicing high-flow Schrader valves. Quickly connect a digital stub gauge for easy system diagnostics. The advanced back seat seal makes the core control tool perfect for gauge isolation, adding another layer of protection for your vacuum gauge.Why Use a Core Depressor?Core depressors are extremely useful when charging an A/C system, servicing systems with high-flow Schrader valves, isolating a vacuum gauge, and quickly diagnosing system pressures.Are your Tools Rated for Vacuum and Pressure?All Appion Core Control Tools are Vacuum Rated to 20 microns and designed for high-pressure refrigerants, such as R410A. This will give you the peace of mind that your tools aren't going to leak in a deep vacuum or while pressurized.