12x75mm Glass Test Tubes with Black Screw Caps, 5ml Boro Glass Test Tubes for Scientific Experiments, Candy Storage, Party and Home Decorations, Plant Propagation and Holiday Gifts, HUAOU, Pack of 10

The quality of the tubes is very good. The seller packed my purchase well and delivered safely. I used them to save the kitty whiskers from my cats and packing the incense sticks.

The glass is not too thin and dimentions are as quoted. I recommend them.

The 15ml (16mmx150mm) holds 20ml. This extra space may exist for all sizes, so just be aware of that, should you want the smallest size possible for what you want to hold. A secondary consideration is that the inward bend at the lip that allows the cap to align flush with the wall also prevents them from pouring out smoothly in controlled amounts like you can with a normal test tube. I pipette the volume I want out, and I recommend a bent-tip pipette for anyone wanting to pipette liquids out of these. One piece was chipped along the threading. Some of the lids sit a little crooked, but they all seem to seal liquid tight. Small debri of some kind was found in one tube. Otherwise they are perfectly fine and I will be buying again.

Great value. Came very quickly.

As described

These glass tubes are just what I needed for the clinic, and they were very safely packaged for shipping. Excellent!

good quality boro heats up with maap to blow within minutes, and is thick enough towithstand theheat from a propane torch while cooling down quickly to avoid burning things

The tops can be a blessing & a curse at the same time. They're great!