Features:1. Made of high quality material, rust-resistant, solid and durable to use.2. The interface outer diameter is 9.5mm, the interface inner diameter is 6mm.3. Suitable for computer CPU water, industrial frequency inverter drive, laser head cooling, industrial control cabinet cooling.4. Easy to install and convenient to use.5. 100% brand new and high quality.Specification:Condition: 100% NewItem Type: Water Cooling BlockMaterial: Pure AluminumProcessing: Vacuum Aluminum BrazingInterface outer diameter: Approx. 9.5mm / 3.7inInterface inner diameter: Approx. 6mm / 2.4inApplication: Suitable for computer CPU water, industrial inverter drive, laser head cooling, industrial control cabinet coolingOptional Size: #1: Approx. 40 * 40 * 12mm / 1.6 * 1.6 * 0.5in #2: Approx. 40 * 80 * 12mm / 1.6 * 3.1 * 0.5in#3: Approx. 40 * 120 * 12mm / 1.6 * 4.7 * 0.5in#4: Approx. 40 * 160 * 12mm / 1.6 * 6.3 * 0.5in#5: Approx. 40 * 180 * 12mm / 1.6 * 7.1 * 0.5in#6: Approx. 40 * 200 * 12mm / 1.6 * 7.9 * 0.5in#7: Approx. 40 * 240 * 12mm / 1.6 * 9.4 * 0.5inPackage List:1 * Water Cooling BlockNote: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.