The Mastercool 87772-M 2-Way Aluminum Manifold Gauge Set with 183 cm Hoses and 90° Snap-N-Seal Couplers and 63 mm 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 183 cm hoses with 90° Snap-N-Seal couplers, 63 mm silicone dampened gauges for smooth needle movement, displaying R134a refrigerant pressure and temperature correlations (Metric).