1. Single EU wall mount box, v2 with 4 single holes, v3 with 2 triple holes, 67mm deep. Drill holes (cable grommets) for cables yourself on place where you need it. Use filament with fire retardard, for example PETG-FR - FRJET.
   
2. Triple EU wall mount box, 60mm deep. If used for data cables, then standard PETG is ok, otherwise use filament with fire retardant too. For gypsing into wall print spacer and attach it, to have the right pitch between lengthwise walls. After printing two boxes for my needs I made few modifications: added reinforcing columns in the midle to avoid walls bending and added reinforcement walls over the arcs for the same reason - gypsum will then hold the walls in right pitch..
   
   One triple box comes with grommet on one side, the second is without. The one with grommet you can mirror yourself before printing to have grommet on side you need it.
   
   Before other masonry work, you can attach a cover to protect the cables from dirt.

In the Czech Republic, these boxes are manufactured by the company KOPOS KOLÍN, a.s., that's why the files are named that way, although these models have nothing to do with this company and the design is my own.

The design of a single deep box came about because I couldn't find a deep box at the weekend. And when I finally got it, it was quite small for me to connect 4 cables and a switch. That's why I made my own.

The triple box was created because I needed to bring an HDMI cable and 2x UTP to the planned projector on the ceiling. The problem was especially with the clumsy HDMI keystone - it has a very stiff cable and I needed a box without partitions.