90? R134A Quick Connectors Adaptors High Side/Low Side Brass Couplers Automotive AC System Maintenance Tools Tank Hose Adapters Blue: Low Side Quick Connector/Adapter (1/4" SAE Male Flare) Red: High Side Quick Connector/Adapter (1/4" SAE Male Flare) Solid Brass Metal Construction / Capped Flares Fits R134A Service Ports With 1/4" SAE Male Flares Color Coded For Added Convenience