The Mastercool 92661-G 2-Way Aluminum Manifold Gauge Set 60" Nylon Barrier Hoses with Manual Ball Valves and 2 1/2" Gauges with Shock Resistant Gauge Protectors comes 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 60" manual ball valve hoses, 2 1/2" silicone dampened gauges for smooth needle movement with shock resistant gauge protectors, displaying R12, R22 and R502 refrigerants pressure and temperature correlations in PSI and °F.