Cooler Master Vertical Graphics Card Holder Kit V3 – White – Supported Graphics Cards: Any length, up to 3 slots wide – Riser Cable PCIe 4.0 x16 – Electronic Component Materials: PCBA, Tinned Copper Wire 30 AWG – Insulation Materials: PE, TPE – Other Materials: ABS, PP, SGCC Steel, Nickel, Gold, Brass – Required PCI slots: Minimum 4 PCI slots required for mounting – MCA-U000R-WFVK03