PCI-E Riser Cables sold by Mnpctech are 25mm or 30mm long. They are high speed EMI shielded extension cables for your PCI-E 16x GPU slot. They're also called "Riser cards" with flexible cable. This 30mm PCI-E cable was included with Lian-Li's O series wall mount cases, but can be used in any chassis or scratch built PC that needs a PCI-E video card moved away from the motherboard. They can also be used to replace the riser cable in your Thermaltake Core P5 chassis.