The Mastercool 85113 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 3 1/8" silicone dampened gauges for smooth needle movement, displaying R134a refrigerant pressure and temperature correlations in PSI/Kpa and ºF. Manifold and gauges only. Hoses are NOT included with this set.