Description: 100% brand new & high quality. Feature: This flow indicator is used to observe the water flow rate in water cooling systems, in case the pump stops working and causes overheating. The design is novel, simple, and practical, easy to install, small in size, and durable. The green impeller is convenient for observation, normally used in computers or other water cooling systems. G1/4 standard thread fits most computer cooling pipes or connections. Besides observing water flow, it's also a great and delicate decoration. Specification: Material: Tungsten Alloy Color: As the pictures show Dimension: 4.4x3.5x2.5cm (LxWxH)/1.73''x1.38''x0.98'' (Approx) Screw: G1/4 2 threads Impeller: 5 blades Quantity: 1 Pc Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. Make sure you don't mind before bidding. 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: 1 Pc x Flow Indicator (other accessories demo in the picture are not included)