How: Features: This indicator is used to observe the water velocity of the water cooling system to prevent overheating caused by the pump stops working. The design is novel, simple and practical, easy to install, small and durable. The green rotor is easy to observe and is often used in computers or other water cooling systems. Standard G1/4 threads are widely used in most computer cooling pipes or connectors. In addition to watching the water, it is also a great and sophisticated decoration. Specifications: Material: Tungsten Alloy Thread Standard: G1/4" Quantity: 1 Piece Package Includes: 1 x Water Gauge Feature:Instructions for Use: This gauge is used to observe the speed of the water water cooling system, in case the pump stops working and causes overheating Simple and practical: novel design, simple and practical, easy to install, small size, durable Easy to observe: the green impeller is easy to observe, usually used in computer or other water cooling systemWide Application: Standard G1/4 Thread is widely applicable to most computer cooling pipes or connectorsAlso a great and exquisite decoration: besides watching water, it is also a great and exquisite decorationSpecification: 2-Way G1/4 Thread Type: Sensor/Gauge Material: MetalColor: Silver, GreenWheel Dimensions: 42mm X 36mm X 25mm (1cm=0.39")Package Included:1x 2-Way Gauge