Stainless steel high pressure sealed vacuum bellows, about 3-inch diameter. I brought one of these home, it holds up the alarm clock and acts as an earthquake meter, swaying for a full minute when nudged. - Misc-misc-photos-12-5-07-industrial-junkyard-full-set - Paul Furman Photography
Stainless steel high pressure sealed vacuum bellows, about 3-inch diameter. I brought one of these home, it holds up the alarm clock and acts as an earthquake meter, swaying for a full minute when nudged.