Wide Compatibility: This adapter is designed for use with R32 and R454B refrigerant tanks, making it ideal for modern HVAC mini split vacuum adapters and pressure gauges. Specifically engineered for professionals working with today's advanced air conditioning systems. Durable Brass Construction: Crafted from robust brass material, this adapter offers excellent resistance to wear, ensuring long-lasting performance even in demanding environments. The knurled grip design allows for secure handling and easy manual tightening, perfect for use in tight or hard-to-reach spaces. Standard Connection Size: Featuring a 1/4-inch female SAE connection on one end and a 1/4-inch male reverse thread on the other, this adapter seamlessly integrates with refrigerant hoses, vacuum pumps, and manifold pressure gauge assemblies for smooth, reliable operation. Reverse Thread Safety Design: The unique reverse thread configuration helps prevent cross-threading and ensures correct connections only with compatible refrigerant systems, enhancing safety and reliability in professional HVAC applications. Ideal for Professional Use: Perfect for R32 and R454B refrigerant charging or recovery, as well as general maintenance of small split HVAC systems. A must-have tool for licensed refrigeration and air conditioning technicians requiring precision and reliability in the field.