[High Purity Red Copper] The bottom of the cooling kit is made of red copper to effectively prevent oxidation. ^^ [Wide Tube Compatibility] Suitable for 8-10 mm diameter tubes. ^^ [ Hole Position] Fits well with GPU and improves the efficiency of heat transferring. ^^ [Efficient Heat Reduction] Keeps your computer GPU running well with a large water area. ^^ [Easy Installation] Equipped with two-touch fitting and screws for hassle- installation.