XtremepowerUS 4 Way AC Manifold Gauge Set R410A R22 R134A HVAC Diagnostic Charging Tool Blue Gauge (low): 0-550 PSI, Red Gauge (high): 0-750 PSI Red and Blue 60" long charging hose R12, R22, R134A (1/4" x 60") Yellow 60" long charging hose R12, R22, R134A SAE (5/8" x 60") Works for R410, R22, R134a Burst pressure: 4000PSI, Max working pressure: 800PSI