wg48 - 4-11-2016 at 03:43
Sigma Aldrich apparently sell very glass looking PTFE Raschig rings.
![z137553-large.jpg - 39kB](https://www.sciencemadness.org/whisper/files.php?pid=465995&aid=54602)
They have apparently used the same picture for all their glass and PTFE rings. Thats the kind of sloppiness I have come to expect from many ebay
seller but not Sigma.