Review on Laboy Glass 500ML Single Neck Round Bottom Boiling Flask Heavy Wall With 24/40 Joint Heating Reaction Receiving Flask Organic Chemistry Lab Glassware by Brian Graham

It took a little longer than I expected for these to arrive, but they seem quite nice. The only thing I've done so far is check the fit with my heating mantle and they are slightly under size. That isn't a big deal in my case - the actual total volume doesn't have to be exact and they do vary between manufacturers. If I can remember to do so, I'll update my review with the actual dimensions.update: the measurement is a little tricky - my calipers don't have jaws that reach far enough to make it to the center diameter, so I had to find a different way to do it. I got 3.960 inches (100.6mm) for the largest diameter.