Wide compatibility:Compatible with R32 refrigerant and R454B refrigerant tanks, it is highly suitable for use with HVAC mini split vacuum adapters and pressure gauges. Designed specifically for technicians using modern air conditioning systems.This adapter is made of sturdy and brass, which is corrosion-resistant and wear-resistant. The knurled grip design ensures a firm hold and easy manual tightening, even in tight Spaces. Standard connection size:On one side, there is a 1/4-inch female SAE accessory, and on the other side, there is a 1/4-inch male reverse thread to ensure smooth integration with the refrigerant hose, vacuum pump and manifold pressure gauge assembly. Reverse thread safety:Special reverse threads can prevent cross-threading or incorrect connection with incompatible refrigerant types, ensuring safe and reliable operation in professional environments. Suitable for R32 R454B refrigerant adapters, small split HVAC maintenance, precise refrigerant charging or recovery. Essential tools for licensed refrigeration and air conditioning technicians.The packaging includes: 2pcs * R32 thread adapter