WIDE COMPATIBILITY - Charging port adapter R12 R22 Port to accept R134a Quick Disconnect. These Low/High side retrofits/adapters/fittings will convert your 1/4 inch SAE or 7/16 inch-20UNF R12 R22 charging port and accept the R134a quick disconnect hose. With solid copper material, resistant to corrosion & good extensibility. EASY INSTALLATION: The low AC fitting conversion adapter saves time and effort during installation. 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 Coupler, 1 * high-pressure quick coupler, 1 * 13 mm Blue Cap, 1 * 16 mm Red Cap. Only the above package content is included; other products are not included. Note: Light and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3cm.