Corsair Hydro X Series XL5 Performance Coolant brings your custom cooling system's color scheme to life and is available in a wide range of vibrant, translucent colors. The pre-mixed and ready-to-use XL5 Performance Coolant contains corrosion and antibacterial inhibitors that keep your custom cooling system clean and cool. It is designed to protect fittings and blocks made of copper, brass, and nickel, while adding vivid colors and cool temperatures to your custom cooling setup.