Material: Made from metal materials, this water flow indicator ensures long-last performance and reliability in your water cooling system Easy Installation: With its simple yet practical design, this flow indicator is easy to install into your water cooling setup. Its compact size ensures it fits seamlessly while offering long-last durability Efficient Flow Monitor: Designed to monitor the water flow speed in your cooling system, this device helps prevent overheating by alerting you if the pump stop working Enhanced Cooling Efficiency: Featuring an 8-blade impeller design, this liquid cooling fan flow meter significantly boosts the cooling efficiency of PC water cooling systems Compatibility: It is widely suitable for most computer cooling tubes and connectors, making it a versatile addition to your setup Specification: Material:Metal Size Chart: Type A: Length: 4.1cm/1.61inch,Diameter: 0.6cm/0.24inch Type B:Length: 4.1cm/1.61inch,Diameter: 0.8cm/0.31inch Package Includes: 1 Piece Water Flow Indicator Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.