Feature 1Used for connecting 1/4 inch hose fitting to R134a automobile refrigeration tank 2Quick, easy connect and disconnect 3Reliable and safe for valve access to systems even at working pressure 4High & Low couplers kit with colored knobs for easy identification 5Valve actuation eliminates possibility of refrigerant lossDescription: This brand new set of 2 colorcouplers offer you thegreat convenience to attach the manifoldhoses onto the auto/car AC R134a system during the diagnosis, charging or evacuation working. It can quickly connect the hose withoutleaking refrigerant,and you don't have to pour the new refrigerant into the air conditioner, which is very safe and convenient. Features: 1. 1/4" male flare fitting for automobile A/C service. 2. Red for high pressure side and blue for low pressure side. 3. High & Low couplers kit with colored knobs for easy identification. 4. Solid brass metal construction is very durable andcorrosion proof. 5. Reliable and safe for valve access to systems even at working pressure. Specifications: Material: Solid Brass Metal Color: Red + Blue High Side Coupler: Red Low Side Coupler: Blue Connecter: 1/4" Male Flare Fitting Package Weight: Approx. 140g Quick Joint: Air Conditioning Suitable For: R134a Valve Core Package Included: 1 x blue low side quick coupler 1 x red high side quick coupler Note: Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.