The Mastercool 85161-M 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 152 cm hoses without couplers, 80 mm silicone dampened gauges for smooth needle movement, displaying R134a refrigerant pressure and temperature correlations (Metric).