Diameter of hole is 7 Inches

It will fit any 12U Server Cabinet, 10 inch Server Rack for Network

PETG 

No Screws

Example is

GeeekPi 12U Network Rack, 10 inch Mini Server Rack for Network, Servers, Audio, and Video Equipment, DeskPi RackMate T2 Rackmount, 10.23 inch Depth 

Can fit HP Pro 400 G9 MINI