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