Good Afternoon- We have the 40N2 Cable Smart series which is a non-metallic two channel raceway. This is sold through electrical distributors. Please see attached link. https://legrand.webdamdb.com/directdownload.php? ti=55654489&tok=URzbWvfC2km6S0NuHS5FbwRR
No, this is a single pole switch.
You have to use a small screwdriver, inside it has indentations that you can remove to open it
The box is plastic. Do you can opened to desired size