Features Scope of Application: Aluminum water cooling block is suitable for computer CPU water, power frequency inverter drive, laser head cooling, and industrial control cabinet cooling. Seiko Manufacturing: the outer diameter of the interface is 9.5mm, and the inner diameter of the interface is 6mm. We have strict quality control system to ensure product quality and quality stability. Premium Material: This water cooling block is made of high-quality material, which is rust-proof, sturdy and durable, with a long service life and more peace of mind to use. Easy to Install: The 100% new liquid cooler is easy to install and can be installed directly, a good replacement for damaged or faulty ones, bringing you more convenience. Excellent After-sales Service: We provide you with high-quality after-sales service. If you have any questions, please feel free to contact us, and we will deal with it for you as soon as possible. Specification: Condition: 100% Brand New Item Type: Water Cooling Block Material: Pure Aluminum Processing: Vacuum Aluminum Brazing Interface outer diameter: Approx. 9.5mm / 3.7in Interface inner diameter: Approx. 6mm / 2.4in Application: Suitable for computer CPU water, industrial inverter drive, laser head cooling, industrial control cabinet cooling Optional Size:  #1: Approx. 60 * 60 * 12mm / 2.4 * 2.4 * 0.5in #2: Approx. 60 * 180 * 12mm / 2.4 * 7.1 * 0.5in Package List: 1 * Water Cooling Block Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List