The Mastercool 89772 2-Way Aluminum Manifold Gauge Set with 72" Hoses with Manual Couplers and 2 1/2" Gauges 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 72" hoses with manual couplers, 2 1/2" silicone dampened gauges for smooth needle movement, displaying R134a refrigerant pressure and temperature correlations in PSI/Kpa and °F.