Robinair (49134A) R134 Aluminum Manifold, Hose Set and Service Couplers Robinair Aluminum Manifold, Gauge, Hose, and Coupler Set for servicing R-134A refrigerant systems Manifold is designed so all three lower fittings are connected to each other by internal passages Separate passages from the low-side and high-side fittings to their respective gauges give pressure and vacuum readings whether the handwheels are open or closed Handwheels and gauges are color-coded, with the blue compound gauge on the low-side (left), and the red pressure gauge on the high-side (right) Kit includes: blue anodized aluminum manifold, brass fittings, color coded gauges, 60 inch (5 foot) long hoses, color coded 90 degree manual couplers, and a blow molded case