The Mastercool Brass R404A, R407C, R507A & R134a 2-Way Commercial Manifold Gauge Sets with 1/4" SAE Hose Connections come complete and ready to work. With features like brass body, large knobs, free-floating piston type valves, additional access port for vacuum line, extra large sight glass for visual refrigerant check and silicone dampened gauges that are easily re-calibrated in the field for increased accuracy. Includes set of 72" nylon barrier hoses with auto shut-off valves, 3 1/8" silicone dampened gauges for smooth needle movement, displaying R404A, R407C, R507A and R134a refrigerants pressure and temperature correlations in PSI, Bar and ºF.