Hydrometer tube. I use these tubes and I'd like to address the 3 main complaints I've read in the reviews. The number one issue is fragility. It's true, they break easily and I've broken 3 this year. I don't care, I like the thin glass. I like to test my samples at the recommended 60 degrees and I use hot or cold water (usually cold) to adjust the temperature of the sample in the tube. The thin glass allows a quick exchange of heat. When testing 180 proof spirits I will only use glass, never plastic. Secondly, the plastic base could fit better but it is sufficient. I heat and cool the sample in a 1/2 gal plastic milk jug with the opening slightly enlarged. I like that I can remove the base so it will fit in. The one piece glass tubes with permanent glass base are too wide to fit in a small opening. Lastly, I don't want the tube any wider because that ends up wasting too much wash. Despite its drawbacks, this is the tube I prefer.

just what I needed . concrete is not my friend, I will try to be more careful in the future

zzzzzzzzzzzzzzzz. very good

Test Cyliinder - Glass - 13". I gave it a 3 because it functions as advertised. However there are 2 issues that I don't like: 1) The glass cylinder does not fit all the way down to the bottom of the base - it works but I think it might be more stable if the base fit the glass better; 2) the inside diameter of the glass is 1 5/16". The plastic one I have in 13/4" and that extra 1/2" makes it a lot easier to pore liquid out of a quart jar and there is a tendency to spill shine out of the smaller cylinder. Just saying.....

Too fragile. I like to use glass whenever possible, but I'm going to order the plastic cylinder next. I had the same problem as others, just a slight tap with the alcoholmeter and the bottom punched right out. Plastic base did not hold the base very securely. Not like I'm out a lot of money, but now I'm dead in the water till I can order a replacement.