Well on my old PC table i had a huge mess with all the cables so i ordered a few things in a special electrician shop the grey one is for hiding all the cables. when you stand infront of the table you see no cable because all is hidden in it and comes out behind the pc it looks really cool. into the white one i installed 4 Swiss 3xT13 Plugs so i have in total 12 230V 13A plugs :D so plenty room for electronic stuff. i'm really happy how it came out and how it hides all the cables