This G1/4 Inch screw plug can be used for many applications. So you can use it for the radiator, reservoir and some other components. Alphacool have this plug screw in 2 different colors: Chrome and Deep Black. Thus you can now bring your modding project in a uniform color to shine . Technical specifications: Material: Brass Colour: Deep Black Thread size: G1/4 Inch Height without thread: 4,25mm Top diameter: 18mm Extent of delivery: 1x Alphacool Screw with O-Ring G1/4 Inch - Deep Black