The Indium is made of an as-of-yet unknown metal. It feels too heavy to be aluminum, and it's not magnetic, so it isn't iron, mild steel, nickel, or cobalt either.
It is anodized inside and out - including the threads, so I cannot determine what kind of metal it is made from.
I'm pretty certain it is not made from indium - the cost of the flashlight is much too low for that. /ubbthreads/images/graemlins/smile.gif
(A moment later): According to the website, it *IS* made of aluminum. /ubbthreads/images/graemlins/eek.gif