1. The fluoride valve for household air conditioners has good sealing performance, and the adjustment knob can control the expansion and contraction of the thimble. 2. There is a movable thimble in the valve to control the opening and closing amount of the inner core. 3. Selected high-quality materials, sturdy and durable, wear-resistant, corrosion-resistant, and anti-aging. 4. The valve can be moved back and forth through the thimble to achieve no leakage, environmental protection and no frostbite. 5. This safety valve is compatible with R410 and is easy to operate. It is a perfect accessory for air-conditioning fluoride., Manufacturer: Candeon