Let's learn about some science glass. Today's repair is large Industrial size stir shaft for 50L and 72L flasks or reactors. This is a very common repair on Stir shaft, I have fixed hundreds of them with the same break. This is a typical break due to user error and they bust off the little peg that holds the paddle on. This job is definitely worth saving as that tubing is precision tubing . Most glass tubing is not that precise and can vary a few millimeters each way but not when it comes time f