Mine came with my case, I believe the wire mesh (screen) is aluminum. The screen in my Air Conditioner is similar but made of an electrostatically charged plastic fiber.
<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>