WIDE COMPATIBILITY - Charging port adapter R12 R22 Port to accept R134a quick connect. 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 connect hose. PREMIUM QUALITY - With solid copper material, corrosion-resistant good ductility. EASY INSTALLATION: The low AC connection conversion adapter with time-saving and effort-saving installation, 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. Color: gold Material: brass Package Contents: 1 * low pressure quick connector 1 * high pressure quick connector 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 +/- 1-3 cm.