Features: brand new and high quality Made of high quality copper, durable and not easy to rust. Used for rapid separation of water cooling equipment and heat dissipation parts to reach the two-way water stop function. Mobile phone, laptop desktop and other cooling equipment separation two-way water stop. Accessories for computer water cooling systems,with this water - cooled part, your computer performance will be further improved. Easy installation, will not damage the computer host. Specifications: Material:Copper Thread Specification: G1/4 Outer Diameter:12.9mm/0.51in Maximum Diameter:Approx.18mm/0.71in Minimum Diameter:Approx.16mm/0.63in Overall Length:Approx.5cm/1.97in Net Weight:52g Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Separate Water Cooling Switch