Product Name : Float Switch;Max Contact Rating : Max Contact Rating;10W : 10W Max Switching Voltage : 100V DC;Max Switching Current : 0.5A Max Breakdown Voltage : 220V DC;Max Carry Current : 1.0A;Max Contact Resistance : 100ohm Temperature Rating : -10 ~ +60 Celsius / +85 Celsius;Float Ball Material : PP Float Body Material : PP;Float Ball Size(Approx) : 28 x 17mm / 1.1" x 0.67"(L x D) Thread Dia(Approx) : 21mm / 0.83" Hex Head Size(Approx) : 23mm / 0.906" Body Total Length : 95mm / 3.7" Cable Length : 30-40cm Color : Black Net Weight : 25g A float switch is a device used to sense the level of liquid within a tank. The switch may actuate a pump, an indicator, an alarm, or other device. It can be easily converted from normally open to normally close by inverting the float. Use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, pumps, ponds, basement alarms, boats, air condition drain pans, pressure washers, carpet cleaning mach, reef aquarium, fluid control, ice machines, coffee pots, marine, automotive, automobiles, tropical fish tanks, evaporator coils, condensation line, in relays, or what ever your project may be. Package Content : 1 x Float Switch Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.