Flexzion Car AC R134a Quick Connectors System Port Adapters Couplers Low High Set Conversion Kit for HVAC Auto Air conditioning with Manifold Hose Gauge Set of 2 color coded 90 degrees quick connectors Blue: Low side quick connector/adapter (1/4" SAE male flare), Red: High side quick connector/adapter (1/4" SAE male flare) Manifold hose connections on both adapters: 1/4" SAE male flare Sold brass metal construction and capped flares. Adjustable to fit different valve cores Quick action 6-ball operated, safe design to protects against injury and refrigerant loss