The Mastercool 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. Hoses are NOT INCLUDED manifold only, 3 1/8" silicone dampened gauges for smooth needle movement, displaying R22, R404A and R410A refrigerants pressure and temperature correlations in PSI and ºF. (1/2-20 UNF)