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:goldMaterial:Package Contents:1 * low-pressure Quick Coupler1 * high-pressure quick coupler1 * 13 mm Blue Cap1 * 16 mm Red CapOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.