The inside of a computer case is often covered in dust.  More importantly, dust can settle inside unoccupied PCI and RAM slots.  Over time, the dust build-up can become significant enough to cause contact problems with newly installed PCI cards or extra RAM memory.  With Vantec's PCI/RAM Slot Protectors, you can easily prevent dust from settling inside your PCI/RAM slots.  Additionally, the Vantec PCI/RAM Slot Protectors are UV-Reactive, a perfect accessory for systems with windowed cases and UV lighting.