Review on π High-Quality Pyrex Glass Tubes for Hydraulic and Pneumatic Plumbing by Bobby Posner
Real Pyrex? Very doubtful
So I have to tell BS it's actually Pyrex. They become extremely brittle when exposed to relatively moderate heat and then break very easily. Weather or not, they're actually borosilicate glass, I can't tell you that. If so, then they appear to be of poor quality. I'm not an expert, but I've used real Pyrex (borosilicate is actually made by Corning) and it's not. For the price I should have known. Good
- Glass tube
- Cable is shorter than others
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