Premium Materials: The air conditioning valve is made of high quality brass with a thickened body section for high strength and durability, and is able to withstand a certain amount of pressure and is very safe. and reliable: the safety adapter is well crafted, the inner parts are sealed and connected, no air leakage, safe and reliable, prevent frostbite on the hands due to leakage during the fluoridation process.【Good design】 The safety valve has a good design with a swivel joint on the top to ensure comfort of use. Easy to use no matter how the safety valve is installed. Product Features: The kit comes with 2 different sizes of valves. R22+R22 is suitable for air conditioners filled with R22 refrigerant, R22+R410 for air conditioners filled with R32 or R410 refrigerant. Product advantages: This air conditioning valve can be installed at the end of a filler pipe and minimize the loss of refrigerant during maintenance.