The water blocks directly cools Intel X99 southbridge (PCH) chip and power regulation (VRM / MOSFETs) module. Please note this water block cools exactly as much heat generating components as GIGABYTE factory cooling solution. It is a high flow water block that can be easily used with systems using weaker water pumps. Base of the waterblock is made of nickel plated electrolytic copper while the top is made of quality POM Acetal material. The sealing is performed by quality rubber gaskets. Water block is mounted with enclosed M2,5×4 DIN7985 and M3x4 DIN7991 screws and PVC washers. The 2.5mm nickel plated brass screw-in standoffs are already preinstalled and allow for easy installation. Enclosed thermal pad is used on voltage regulator module to improve cooling performance of the waterblock. On the southbridge please use any electrically non-conductive thermal grease, e.g. Gelid GC-Extreme. A maximum diameter of barbs/fittings on SB part of the water block kit must be 22.2 mm in order to allow the installation of the graphics card mounted with EK-FC series backplate in the first PCIe x16 slot! However when using fitting bigger than EK-CSQ Fitting 10/13mm it is mandatory to use EK-CSQ Extender 8mm. Enclosed: – 2 x water blocks (MOSFET & SB) – mounting mechanism – thermal pads Fittings are not enclosed! Four fittings are needed to make this waterblock to operate properly. All EK-CSQ fittings are compatible with this water block! Made in Slovenia – Europe!