They are tin tiles. Here is Google's first result for "tin backsplash tiles" http://www.americantinceilings.com/backsplash.html

Hi...this is my kitchen and the backsplash is actually from Lowes (it's in the kitchen cabinet section in my store) and it's a hard plastic. You can NOT tell it's not tin unless you go up and touch it. My entire backsplash cost a little over $100.00...you can't beat the price for the look you get! :)

when did you buy it and do you know the name of it and if it is still available. Thank you for your time in advance.

I did it six years ago, and yes they still have it online. Go to lowes.com and type in fasade, and multiple choices should pop up. I believe mine was called crosshatch silver. :-)

We carry the same pattern in Aluminum, very popular. If you like the metal look choose clear coated: http://www.decorativeceilingtiles.net/products/0604-PRINCESS-VICTORIA-BACKSPLASH.html