This is a rackmount for the Dell Sonicwall TZ500. It comes with three CAT6 jacks and cables. Simply insert the Sonicwall at an angle from the back then rotate down to fully seat it. This mount is 6mm thick so you may need longer rack screws. If your Sonicwall has rubber feet they must be removed prior to insertion. This is a one piece mount printed with a large format printer.
Please note that 3D printed items will have minor differences between them and may have imperfections (the final results are never the same). This is normal and how 3D printing is. I will try my best to provide a clean and functional product nonetheless.