Watch Glass Beaker Cover Set

Showed up in perfect shape and matches my beakers well.

I use these daily. One larger one came chipped on the edge a little, but I use it anyway. They could be packed with slightly thicker foam between glasses. There were a couple of large glasses in the set anyway, so I'm not worried. The glasses are concave/convex a good amount, so liquids drip back down in the center of the beaker when heating solutions.

Work very well.Edges feel good and not sharp like my older covers.

First one I used was the smallest. About 10 minutes in on low heat (2 out of 5) it just split. Hopefully just a random poor one, air bubbles in glass? I will be looking for a different brand & returning.

The glasses seem fine but one of large ones was completely broken. I don't want to take the time to return it. It's just kind of disappointing.

I wish the glass was a bit thicker/sturdy. They break easily

I havent used them yet, but they appear to be exactly as advertised. They are likely tempered soda glass - fine for the intended/described use. They should NOT be directly heated - not used as container to hold something to be heated - not exposed to flame - not borosilicate. If this is news to you, you probably should not do what you're planning.

I am very happy to receive a complete set of goods, 150 mm, 100 mm, 70 mm two sets, the quality is also very good, bought to the children to school for experimental purposes, he also saw very happy, I hope he can do a happy experiment with him in school.I am very happy to receive a complete set of goods, 150 mm, 100 mm, 70 mm two sets, the quality is also very good, bought to the children to school for experimental purposes, he also saw very happy, I hope he can do a happy experiment with him in school.