CPU Water Cooling Block Waterblock 50mm Copper Base Cool Inner Channel It has two chrome plate copper faucets. The external diameter is 10 mm. The height of the copper base is 5 mm. It has inner water channel. The water contact area is large, thus to carry more heat from the CPU quickly. Can be used on AMD 940, AM2, AM3,Bulldozer, Intel 775, 1155, 1156, 1366,Intel LGA 1150 and LGA2011 platform Provide 1 set of accessory (4 screws)