Description:This metal water flow meter is a necessaryDIY tool kit for computer water cooling system. High quality material ensuresperfect durability and performance. Light and easy to use.Features:8-leaves impeller water flow meter helpsyou to observe the speed and working states of the water flow, so that to avoidoverheating and fully protect computer host.Made of high-quality aluminum alloy + acrylic material,durable to use.Polished surface processing amplifiescutting property and prolongs using life.Adhesive sealing, easy to install and use.Specifications:Material: Aluminum Alloy + AcrylicColor: Red, Blue, Yellow, Silver, GrayShape: OctagonScrew Thread: G1/4 (2 Teeth)Thread Length: approx. 4.5mm /0.17inSize: Approx. 45 x 45 x 30mm / 1.8 x 1.8 x 1.2inPackage Weight: 59gPackage List:1 * Water Flow MeterNote:The color of impellers are random.Please allow 1-3mm differs due to manualmeasurement.Due to the different display and differentlight, the picture may not show the actual color of the item. Thanks for yourunderstanding.