This flow indicator is used to observe the water flow speed of the water cooling system, in case the pump stops working and causes overheating. The standard thread G1 / 4 is widely suitable for most computer cooling tubes or connectors. The green wheel is convenient for observation, normally used in computer or other water cooling systems. The design is novel, simple and practical, easy to install, small in size and durable. In addition to observing the flow of water, it is also a great decoration and delicate. Features: This flow indicator is used to observe the water flow speed of the water cooling system, in case the pump stops operate and cause overheating. The design is novel, simple and practical, easy to install, small in size and durable. The green and turbine are convenient for observation , normally used in computers or other water cooling systems. Standard G1/4 thread is widely suitable for most computer cooling tubes or connectors. Apart from observing the water flow, it is also a great and delicate decoration. Specifications: Material: tungsten alloy Standard thread size: G1 /4 " Quantity: 1pc Package Including 1 x Water Flow Indicator