Quoted:Lowers are aluminum.
Beer cans are aluminum.
How many beer cans would you need to make a lower?
I ask, because I have beer cans. Like, a lot!
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Also, to answer your question, and I know it sounds stupid easy:
Weigh a lower, then weigh ten cans, do math.
I know, I know. You want me to do that. But I ain't gonna.