Feature: 1. From the high-end quality design, top-mounted rotation to consider the use of convenience. no matter how the safety valve placed, can easily switch operation. 2.High-end CNC machine tool processing, a number of parts of the connection can ensure that it is not leaked. the factory has been sealed before the treatment, safe and secure. 3. Selection of experienced design team, in strict accordance with the application of the product design to create. activities thimble can accurately control the air conditioning high and low pressure valve needle. 4. The entire production project to be in accordance with national standards, quality after several tests. the final factory inspection is completed, into the marketing department for sale Instructions: The safety valve stem (thimble) in the back of the safe position, then add the fluorine safety valve screwed on the air conditioning valve. Safety valve stem thimble is not the top of the air valve in the air valve , Then the system will not leak out of the fragrance of fluoride, and fluoride test pressure you can open the fluoride safety valve at the same time safety valve stem thimble will move forward the air valve in the valve stem valve connected to the pipeline, so Safety valve through the thimble before and after the telescopic, to do a zero leakage, environmental protection and not hands Item specifics: Name: Refrigerant retention control valve Material: Copper Model number: R410A/R22 BLUE = R22 Diameter: Male: 1/4" (12mm); Female: 1/4" (12mm) Approved for R22 refrigerant, RED = R410A Diameter: Male: 1/4" (12mm); Female: 5/16" , Quantity: 1 Set, Note: Size for manual measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 Pc X R410A Valve. 1 Pc X R22 Valve.