The Mastercool 85136 2-Way Aluminum Manifold Gauge Sets come complete and ready to work. With features like solid extruded aluminum body, large knobs, free-floating piston type valves, silicone dampened gauges that are easily re-calibrated in the field for increased accuracy. Includes set of three 36" hoses without couplers, 3 1/8" silicone dampened gauges for smooth needle movement, displaying R134a refrigerant pressure and temperature correlations in PSI/Kpa and ºF.