Quick Coupling Adapter R12 R22 Thread 1/4sae To R134a High And Low Coupling Cover 1 Pair, Quick Coupling Adapter (gold) (2pcs) The quick coupling adapter is made of solid copper material, which is corrosion resistant and scalableConversions. These low and high end retrofit adapters will convert your old 1/4" SAE or 7/16"-20UNF R12 R22 filler port to accept R134a quick disconnect hoses.Size. Low side, 1/4" SAE (7/16'-20) x 13 mm, blue. High side, 1/4" SAE (7/16'-20) x 16 mm, redEasy installation: low-level AC adapter conversion adapter, time-saving, labor-saving, light weight and fast installationWide range of compatibility: charging port adapter R12 R22 port accepts R134a quick disconnectColor: GoldSize562cmProduct list: 2 * connector