All of our credenzas are made out of Italian Melamine in 1 inch thickness. You can read more about the material here: http://www.contempospace.com/contempo-space-blog/faq/what-material-furniture-made-from-wood
The file drawers can fit either letter size left to right or legal size files front to back. You can estimate delivery and setup by adding the furniture item(s) you are considering to your shopping cart and entering your zipcode. If you need additional info, you can always contact us by phone as well.