Zonefirst ZDS 18X16 18WX16H Parallel 24V 2 Pos S R Freon this potential style relay is designed this potential style relay is designed to manage the duty cycle of start capacitors by effectively removing them from the circuit once the compressor motor reaches approximately 75% of its rated speed Versatile Port Configuration: Dual size barbed fittings allow for seamless integration with standard pneumatic tubing sizes Rugged Construction: Built with an extruded aluminum frame and zinc plated linkage for superior corrosion resistance and structural integrity in high velocity air streams the ZDS 18X16 features a field reversible motor and a minimum position adjustment screw