Server Cabinet Case:The 4u server cabinet case adopts a combined internal architecture.With 7 x PCI slot, providing additional storage space for hardware, networks, servers, or audio/video accessories. Lockable design: The 4u rack case comes with a key lock for better security and helps prevent damage, tampering, or theft. The front door foam filter is designed to minimize the dust inflow and prolong the service life. High Compatibility: Our 4U computer cabinet is universally mountable in any standard front mount server rack or cabinet, Motherboard Compatibility: 12 x 9.6 ATX/M-ATX/Mini-ITX (smaller than 305mm*245mm/12*9.6inch)