Water Flow Indicator, Standard Female to Female Thread Sight Flow Indicator for Water Cooling Systems [Function]: This flow indicator is designed to monitor the water flow rate in water cooling systems, to prevent overheating in case the pump fails. [Water Cooling Flow Indicator]: The brightly colored polypropylene paddle wheel rotates when gas or liquid flows through the system. [Material]: Constructed from high-quality tungsten alloy with a compact size, this water flow indicator is easy to install and operate. [Application]: Featuring a G1/4 inch standard thread, the sight flow indicator is compatible with most computer cooling tubes or connectors. Color: yellow Size: 43.5 x 2.5 CM Delivery Quantity: 1 Piece Warm prompt: 1. Due to different measuring methods, an item deviation of 1-3 cm may occur; please ensure this is acceptable before ordering. 2. Due to varying monitors and lighting, the picture may not accurately reflect the actual color of the item; thank you for your understanding. 3. Only the contents mentioned above are included, excluding other products.