The Mastercool 2-Way Brass Manifold Gauge Sets come complete and ready to work. With features like heavy duty forged brass body, large metal handles, free-floating piston type valves, hose holder and silicone dampened gauges that are easily re-calibrated in the field for increased accuracy. Includes set of three 36" hoses with E-Z Snap™ couplers. 2 1/2" silicone dampened gauges for smooth needle movement with shock resistant gauge protectors, displaying R134a refrigerant pressure and temperature correlations.