Product: Water cooling Valve- High flow ball valve structure, safe and reliable. Materials: PMMA + POM. The upper and lower covers are high temperature resistant engineering plastics and the transparent part is acrylic. Hole position: G1 / 4 * 4. Equipped with advanced G1 / 4 thread for tight connection, it can be safety and leak-free. Outer diameter: minimum 50mm, maximum 55mm Total length: 100mm / 150mm / 200mm / 250mm / 300mm / 350mm