Item Package Quantity: 1R410a 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 systemFeatures:Brass construction, quick connect, good tensile strength, resisting corrosion and AC low-loss fitting.Come with full swivel tip.With 45angle on the service port site for easier access.Function:Converts the 5/16 inch SAE charging-vacuum ports to accept 1/4 inch SAE gauge-hose set.Application:Great fits for R410a mini split system air conditioners, HVAC and refrigeration service.Specifications:Material: brassConnectors: 5/16 inch female to 1/4 inch male SAE w/ valve core depressorThread diameter: 0.47 inch/ 12 mmThread size: 11 mmTotal size: diameter: 0.63 inch/ 1.6 cm, 2.09 inch/ 5.3 cmPlease note:R410A ductless mini split systems are usually equipped with a different charging port size to avoid charging of wrong refrigerant into the system (i.e. R22)This new port size is 5/16 inch SAE and some gauge sets carry 1/4 inch SAE connectors.Port adapter converts the 5/16 inch SAE ports to use with 1/4 inch SAE gauge sets.