The Mastercool 88472-MG 2-Way Aluminum Manifold Gauge Set with 183cm Hoses with E-Z Snap™ Couplers and 63mm Gauges with Shock Resistant Gauge Protectors 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 E-Z Snap™ couplers, 63 mm silicone dampened gauges for smooth needle movement with shock resistant gauge protectors, displaying R134a refrigerant pressure and temperature correlations (Metric).