Single Relay Box/Cage for Rack Mounting

Single relay box/cage for simply mounting on rack structures. Had to build it from scratch since all single relays out there appear to be on a larger form factor (like this one https://www.thingiverse.com/thing:512183).
This cage/box is for smaller relays factor, similar to this one https://www.thingiverse.com/thing:2667252.