This is a template for a double or single socket or switch. You can mark on the plasterboard and then cut it out to insert the socket box or on the brick wall to cut it out for exact dimensions. 

For the level, you will need 2 small cylindrical bubble level 9.5mm by 31mm (  [https://amzn.eu/d/hwFZM85](https://amzn.eu/d/hwFZM85) ) insert into the grooves. On the template there are marks for the middle of the socket or switch, as well as a mark for the middle of the whole template if you need to put both a double socket and a switch (or a single socket). 

You can print with both PETG and PLA, I made the infill 20% for a more durable structure.