Features: 

This is a mini stainless steel float switch. 
Light weight and simple working principle,high reliability. 
This float switch is a device used to sense the level of liquid within a tank. 
The switch may activate a pump,an indicator,an alarm,or other device. 
This float switch is a simple structure and easy installation liquid level controller. 
It does not have a complex circuit, will not be disturbed and the material selection means 
it can be used with a variety of liquids, pressures or temperatures and can be used in any environment. 
The versatility of this vertically mounted sensor means that it can be installed either at the top 
or base of your tank,depending on whether you for wish to detect the water's rise or fall. 
The float level switch is widely used in electronic,electrical,chemical,water treatment, 
drainage and other walks of life in level control and alarm. 
 
Specification:

Material: Stainless Steel 
Colour: Silver 
Max Contact Rating: 10W 
Max switching voltage: 110V DC 
Max switching current: 0.5A 
Max breakdown voltage: 220V DC 
Max carry current: 1A 
Max contact resistance: 100mΩ 
Max temperature: -30~+125° 
Thread Dia(Approx): 10mm 
Cable Length: Approx 350mm/13.78" 
Size: See above picture 

Note:
Please allow 1-3mm error due to manual measurement.