Make of brass, it has excellent resistance and extends its service life ensuring smooth and stable fluorine addition process The precisely machined sealing structure effectively prevents refrigerant leakage Suitable for adding fluorine to air conditioners and refrigerators Its precise 3 / 8inch interfaces design makes refrigerant addition more and suitable for daily maintenance of air conditioners and refrigerators Provide stable liquid addition control to ensuring the normal operate of the refrigeration systems, Manufacturer: Greabuy