Copying and Pasting lengthy product descriptions?

Hey guys,

I'm in an industry with man different products that have many different specifications. I have a Prestashop website created and will be including product specifications and descriptions to all of my uploaded products. Is this something I can copy/paste from manufacturer websites, or is this going to hurt my rankings? It might be hard to re-word the descriptions and specifications because they're so technical, but I will find a way to do so if it is that big of a deal in Google's…

Copying and Pasting lengthy product descriptions?