WIDE COMPATIBILITY - Charging port adapter R12 R22 Port to accept R134a Quick Disconnect. These Low or High side retrofits or adapters or fittings will convert your old 1 or 4 inch SAE or 7 or 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 and good extensibility. EASY INSTALLATION: The low AC fitting conversion adapter with time-saving and effort-saving while installing, lightweight, shortcut. DIMENSION - Low Side, 1 or 4 inch SAE (7 or 16 inch- 20) x 13 mm, blue. High Side, 1 or 4 inch SAE (7 or 16 inch- 20) x 16 mm. Colour:gold Material:brass Package Contents: 1 x low-pressure Quick Coupler 1 x high-pressure quick coupler 1 x 13 mm Blue Cap 1 x 16 mm Red Cap Only the above package content, other products are not included. Note: Light 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.