Review on 🧪 10-Pack of Pyrex Glass Tubes - 12mm OD, 2mm Thick Wall Tubing for Hydraulics, Pneumatics & Plumbing by John Brazington

So I have to say 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