Thanks for the response.
The site: iluminet.com
The code is on the left sidebar “products” is a wpsp of one column
I want that in mobile becomes a two column (just like “media partners” above) in order to save some space on mobile.
I resolved in a different way: I created a sidebar that shows just on mobile and the code above works perfect, then disable the rest of the sidebars, very useful to fix some other things. Thank you. Diana