Water Flow Indicator, Standard Female to Female Thread Sight Flow Indicator Water Cooling Flow Indicator [Function]: This flow indicator is used to observe water flow speed of water cooling system, in case that pump stops working and causes overheat [Water Cooling Flow Indicator]: Brightly colored polypropylene paddle wheel spins when gas or liquid flows through a system [Material]: Made of high quality tungsten alloy material with compact size, the water flow indicator is easy to install and use [Application]: With G1/4 inch standard thread, the sight flow indicator is widely fit for most computer cooling tubes or connectors Color: yellow Size: 43.52.5CM Delivery Quantity: 1 Piece Warm prompt: 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding 3. Only the above package contents, excluding other products.