The Mastercool 57136 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 36" (92 cm) R410A standard hoses with 1/4" SAE fittings, 3 1/8" (80 mm) silicone dampened gauges for smooth needle movement, displaying R22, R404A and R410A refrigerants pressure and temperature correlations in PSI and °F.