Table width through sidebar

Hello,

i am sure this is a stupid question. But i can’t fix this issue on my own …

my tables are all working fine BUT i can’t fix their width and so they are going through the sidebar and don’t stop in content area. Any CSS i tried failed.
This is my website: http://castor-plastics.com/rohrgewichte-50-250/
I added:

#wrapper .tablepress {
width: 60%;
margin: 0 auto 1em;
}

and some other, but nothing changed. Can you please help me out?

https://wordpress.org/plugins/tablepress/