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Right. PVC should be almost completely transparent when xrayed. and then I think the only reason it might get xrayed is because a sniffer picked up a wiff of the WD40 you wiped the blade with :).

The tooth brush tubes can crush/bend as well. PVC is pretty much indestructible. At least the thick walled stuff (schedule 40?).

For the busted scale? I'm going with the temperature extremes....