Features: brass construction, quick connect, good tensile strength and resisting corrosion Utility adapter: converts the 5/16 inch charging-vacuum ports (new R410a style) to accept 1/4 inch gauge-hose set; 1/4 Inch male x 5/16 inch female adapter Come with full thimble: it will not open the air conditioning core tube during the course of the operation, completely solve the problem of fluoride leakage injury, security is guaranteed. The coupler nuts are deeply knurled for quick finger-tightening; With 45 on the service port site for easier access Application: converts new R410a style 5/16 service ports to accept older 1/4 gauge hoses, great fits for R410a mini split system air conditioners, HVAC and refrigeration service size:6.6*1.2*0.5cm Material:brass colour:Gold Package Contents: 4 * Adapter connector Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.