The MB-ASR3E water block is designed exclusively for the ASUS Rampage III Extreme motherboard. It liquid cools the northbridge chipset and other nearby components. Materials include copper with anti-corrosive nickel plating, acetal body, and an acrylic and steel top cover. G 1/4 BSP nozzle threading, nozzles not included. Package contains cooling block, mounting hardware, and thermal paste.