The plate that makes contact with the CPU is made from pure copper and has 3 heatpipes that get cooled down by the aluminium fins.
The plate, unfortunately, isn’t with mirror finish like the one from Noctua coolers, and this lowers a lot the cooling performance.
The manual describes the installation for the 754,478 and LGA775 coolers. It has some flaws though. For example, the manual first tells you to install the CPU with the screws and then apply the thermal paste, which is completely illogic. Also, the photos from the manual are very low resolution and inexperienced persons cannot understand a lot from them.