What is the drilling diameter to run the pipes from inside to outside? The drilling diameter should be between 6 and 8cm.
![AIrtonsansbarre (1).png]](https://26318745.hs-sites-eu1.com/hs-fs/hubfs/AIrtonsansbarre%20(1).png?height=17&name=AIrtonsansbarre%20(1).png){kind=small}