https://store.astm.org/stp34467s.html
On-Line Ultrasonic Inside-Diameter Control System for Zircaloy Tube Etching
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https://asheville.craigslist.org/msg/d/fairview-drum-rack-clamps-15-inside/7904891472.html
Drum Rack Clamps 1.5" inside diameter - musical instruments - by owner - sale - craigslist
Drum Rack Clamps 1.5" inside diameter. I think they are Roland but not sure. $5. each or $10 for all three. I do NOT reply to emails, unless your phone # is...