20x150mm Glass Test Tube Set with Rubber Stoppers and Plastic Rack, 6 Piece Set, Karter Scientific 150A3

La calidad del producto es bastante buena. La base no me gustó del todo pero si es práctica.

I bought these for a lab. All seem great! I was concerned about it going through the mail and getting here in 1 piece, and it was packed well, and thus made it here fine. I may look to see what other lab ware you have.Nice quality lab ware, packed well and survived the trip! Thanks for carrying these!

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Just what I was looking for!

I purchased these to mix inks and make my own colors, but they are useful for so many things that I really like them.

My teen is very into science experiments so for her birthday, we decided to buy her some test tubes! These were definitely the way to go. The tubes themselves are made of sturdy glass and rubber for the stops. The stand is made of plastic and features six drying stands for each of the test tubes. The drying stands are a very helpful and useful feature as the tubes themselves are great quality! Would definitely recommend!

Great for hands on instruction. Super price

I picked this up for my homeschooled student and 9th grade biology labs. The set was packed well enough to keep it safe during shipping...although the packaging is nothing special and does not work for storage purposes (but this isn't a problem, anyway).The stand is plastic but stabile. The test tubes are okay from the thickness and definitely fulfil their purpose. The included stoppers work well and seal the tubes nicely.It's exactly what we needed and works well for our purposes.

I fill the tube with hot water, then drop the whole tube into a cold beer, just to warm it up by a couple degrees

Easy to assemble