Wide Compatibility - Charging Port Adapter R12 R22 Port To Accept R134a Quick Disconnect. These Low/high Side Retrofits/adapters/fittings Will Convert Your Old 1/4 Inch Sae Or 7/16 Inch- 20unf R12 R22 Charging Port And Make It Accept The R134a Quick Disconnect Hose. Premium Quality - With Solid Copper Material, Resistant To Corrosion Good Extensibility. Easy Installation: The Low Ac Fitting Conversion Adapter With Time-saving And Effort-saving While Installing, Lightweight, Shortcut. Dimension - Low Side, 1/4 Inch Sae (7/16 Inch- 20) X 13 Mm, Blue. High Side, 1/4 Inch Sae (7/16 Inch- 20) X 16 Mm. Colour:gold Material:brass Package Contents: 1 * Low-pressure Quick Coupler 1 * High-pressure Quick Coupler 1 * 13 Mm Blue Cap 1 * 16 Mm Red Cap Only The Above Package Content, Other Products Are Not Included. Note: Light Shooting And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.