Flygt ENM 10 Non Mercury Pump Control Float Switch SPDT, 20', 40', 65' Cable Options Waterproof, Reliable Level Control in Water & Wastewater lightway Duracell Procell batteries are manufactured Size:5 Ft Spindle Duracell Procell batteries are manufactured to rigid specifications to meet some of the highest standards of durability and longevity that professional users demand and expect Positive shut off: The ball check in the valve functions as a reliable shut off mechanism SPDT Switch Configuration – Features a three wire single pole double throw (SPDT) switch that can be wired for normally open (NO) or normally closed (NC) operation this float switch offers a simple yet effective way to control pumps or alarms based on fluid levels