Item Package Quantity: 1 R410a adapter charging vacuum port adapter brass converter with thimble 5/16 inch SAE female quick couplers to 1/4 inch SAE male flare for mini split system Features: Brass construction, quick connect, good tensile strength, resists corrosion and provides low-loss AC fitting. Comes with full swivel tip. Features a 45-degree angle on the service port side for easier access. Function: Converts 5/16 inch SAE charging and vacuum ports to accept 1/4 inch SAE gauge hose sets. Application: Compatible with R410a mini split system air conditioners, HVAC, and refrigeration service. Specifications: Material: Brass Connectors: 5/16 inch female to 1/4 inch male SAE with valve core depressor Thread diameter: 0.47 inch / 12 mm Thread size: 11 mm Total size: Diameter: 0.63 inch / 1.6 cm, Length: 2.09 inch / 5.3 cm Note: R410A ductless mini split systems are typically equipped with a 5/16 inch SAE charging port to prevent incorrect refrigerant charging, such as R22. Some gauge sets come with 1/4 inch SAE connectors. This port adapter allows the use of 1/4 inch SAE gauge sets with 5/16 inch SAE charging ports.