Have about 10 of these..... they are non-magnetic, about 1 inch x 2 inch x 5 inch, and HEAVY for their size. didnt weigh it yet, but it feels about 5lbs. I thought when I was looking at it and when I hit it with the magnet it was aluminum, but when I picked it up it is WAY to heavy to be aluminum. The guy I got them from said he thinks they were spare parts for film projectors (the film runs through this part somehow)


My question is, what material is this? Its looks like aluminum, but is way to heavy. Could be stainless maybe but doesnt look like any stainless Ive ever seen. Any clues?