The water block itself is made of pure copper for increased heat dissipation and has the Thermaltake logo molded into it. The included PCI slot bracket has two holes in it for connecting the hoses and a power jack connected to it with a lead that connects to your 12 volt rail on your power supply to power the twin pumps. That's right; this cooler has two pumps working in parallel to keep the fluid flowing through the loop. It is a self contained system other than the water block that mounts onto your CPU. You can remove the back cover by taking out four screws that hold it in place. This allows you to see the working parts of the system. This reservoir is already filled when received and will need to be filled further after the system is started up for the first time. This is due to the fact that the hoses and the water block are empty to when shipped and will drain the reservoir a little as they fill when the system is first started. When the fluid returns to the tower from the PC after it passes through the water block, it should be warm from drawing the heat. In the tower, the fluid passes through a large aluminum radiator with three 120 mm fans which blow at 1400 RPM to dissipate the heat.