Are PCIe brackets standardized?

Are PCIe brackets standardized? pcie slot bracket Custom PCI Slot Brackets for USB and DVI Ports 79K views · 3 years Explaining PCIe Slots pcie 4 in pcie 3 slot Bracket for a single slot PCIe riser cable

pcie 4 in pcie 3 slot Connect external components like a MO-RA radiator to your internal cooling loop with this simple pass-through bracket Ships from Sydney for fast delivery

pcie cem slot PCIe SATA Card 6Ports, RIITOP PCI-e Express to SATA3 6Gbps Expansion Controller Adapter Card, ASM1166 Chip Non-Raid,with 6 SATA Cables and Low Profile With its solid, all steel construction, this bracket allows you to securely mount your graphics card, or any PCI Express card, vertically inside your case It