A/C Charging Port Adapter Retrofit R12 to R134a Conversion Fitting kits Set Specifications: Material: Metal, Plastic Color: As Picture Size: 3.7*2*2cm / 1.5*0.8*0.8in Red Adapter: 1/4 SAE (7/16- 20 UNF) x 16 mm Blue Adapter: 1/4 SAE (7/16- 20 UNF) x 13 mm Features: Premium Material Made of premium metal and plastic, heavy duty, anti rust, sturdy and durable to use. R12 to R134A Practical tool kit that help to convert your old R12 compressor valve to new R134A system that can be filled with R134A refrigerant, make it accept to 1/4 inch R134A quick disconnect hose. Retrofit AC System Simple AC charging port adapter set for you to have successfully retrofit, equip your car air conditioning with safer and more environmental friendly R134A filler. Strong Seal With green strong rubber O ring seal to make no leakage, stay fit on your refrigerant charging port, great little tool kit. Easy to Install Simply screw to install, quick connector, red cap (Larger) is high pressure side converter and blue cap (Smaller) is low pressure side converter. Notes: Dear customer, as for the R12 to R134A conversion, since the R134A is at a higher pressure, you have to check whether your factory compressor has the capacity to work properly with the new R134A at first, or it will work hard and cause leak. Be Careful with car AC refrigerants for they are cold and may cause hand frostbite/ eyes damage, you may wear protective gloves and eyeglasses when dealing with AC refrigerant problems. Due to effect of light, camera and monitors, real items' colors may have slightly difference. Allow slight dimension difference due to manual measurement. Thank you for your kindly understanding. This product is Non-Original Aftermarket Parts, please check before buying. We recommend you find the Professional Installation. (Installation instruction is not included.) Package includes (as pictured): 1 x Conversion Adapter Set(Others are NOT included)