5 Impeller Water Flow Meter Cooling Flow Indicator G1/4 Thread Copper Plated Feature: This flow indicator is used to observe water flow speed of water cooling system, in for case that pump stops working and causes overheat. The design is novel, simple and practical, easy to install, small size and durable. Green impeller is convenient for observation, normally used in computer or other water cooling systems. G1/4 standard thread is widely fit for most computer cooling tubes or connectors. Apart from observing water flow, it is also a great and delicate decoration. Specifications: Material:Tungsten alloy Color: As Pictures Show Dimension:4.4x3.5x2.5cm(LxWxH)/1.73'x1.38'x0.98' (Approx.) Screw: G1/4 2 thread Impeller: 5 leaves Quantity: 1Pc Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! 4.No retail package Package includes: 1Pc x Flow Indicator (other accessories demo in the picture are not included)