Pre-coolant filled ready to use water cooling kit The practical set for a quick & easy installation Simple assembling using the Nex Xxo S Pro 80 Radiator Stable operation even in extreme summer temperatures This cooler is conceived for the highest requirements. The bearing surface of the cooler is flat & polished. The sealing between plexiglass & the copper cooling element is made by means of a durable O-ring With the 80 Radiator & the high-quality fan you can have it all installed in 5-10 minutes Completely filled & ready to start