Do these units allow rails to slide forward on or must they be fastened directly to the rack?

Hello, we have reserved 3 small holes on each of the two sides for installing the guide rail, but we cannot guarantee that they will align perfectly with the holes on the guide rail.

Questions & Answers: 4U Server Chassis Rackmount, 7 PCI Slots, Ventilated Front Panel with Lockable Security Door, Heavy-Duty Industrial Computer Case

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4U Server Chassis Rackmount, 7 PCI Slots, Ventilated Front Panel with Lockable Security Door, Heavy-Duty Industrial Computer Case

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)

$89^.99 –