Get some extra ventilation in your system with the Nexus PCI-300! Is the inside of your PC case heating up? Could it use some more fresh air? But there are no more ventilation holes available? You can place the metal mesh PCI-300 PCI-Slot brackets in your unused PCI-Slots to have some extra ventilation in your system. A cheap, quick and easy solution for extra ventilation. It would not hurt! Features 3 units in one package Strong shaped metal mesh Quick and easy solution! Universal design