Features: Small size and easy to install. Safe and will not release any toxic substance. Automatic control, less water from the fill, the water from the stop. Can control the booster pump'work, avoiding pump idling. Suitable for water tank, water tower, pool, water storage tank, solar water tank for drinking water level automatic control. The booster pump can be controlled to prevent idling of the water pump from damaging the water pump. Without electricity, water level can be automatically controlled when connected to clean water with pressure greater than 0.2kg. Package Includes: 1x Water Float Valve Specifications: Material: Plastic Size: 10.1x7.7cm/4x3in Applicable temperature: 0-70 Thread: G1/2 Maximum switching current: 0.25A Maximum load current: 0.25A Maximum contact resistance: 100M Maximum load power: 5W Maximum switching voltage: 110VDC Maximum breakdown voltage: 175vdc note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.