Product Name: Water Level Sensor;Float Ball Size: 18 x 16mm(D*H);Screw Thread Diameter: 7.5mm/0.3"Washered Nut Diameter: 12.5mm/0.49";Retaining Clip Diameter: 13mm/0.5"Max Contact Rating:10W;Max Switch Voltage: 100V DC; Max Switch Current: 0.5A;Max Breakdown Voltage: 220V DC; Max Carry Current: 1.0A; Max Contact Resistance: 100m;Temperature Rating: -10 ~ 85 Degree; Float Ball Material: P.P; Float Body Material: Plastic.Body Length: 45mm/1.8Cable Length: 36cm/14Color: White Yellow; Weight: 10g; Package Content: 1 x Water Level SensorA float switch is a device used to sense the level of liquid within a tankThe switch may actuate a pump, an indicator, an alarm, or other deviceNote: because the current the switch can carry is much little(0.5A), you must a relay or contactor when it is connected by a load, relay and contactor are not included here.Note:Light and differnent displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.