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