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Your cart is empty.Test Tubes are made of 3.3 borosilicate glass to reduce pH changes and contaminants potentially leached from soda-lime glass. Including Cork Stoppers to fit. Karter Scientific is a registered trademark in United States of America. To maintain quality control, authorized permission is required in the resale of our products.
Benjamin Heffner
Reviewed in the United States on February 7, 2025
Thin glass but nice and clear, great for my project and can withstand heat well but careful if reshaping, they don’t behave like borosilicate glass and can crack if cooled unevenly. The bottom of them is particularly thin.
Andrew Martinez
Reviewed in the United States on January 25, 2024
The media could not be loaded.
denis grondin
Reviewed in Canada on July 12, 2023
Good product for the price.
Berna
Reviewed in Mexico on May 9, 2022
Los tubos son tal y como se ven en las fotos, sin embargo el cepillo tiene un mango bastante largo (16 cm) en comparación con la parte de las cerdas (9 cm).
Dominic Palumbo
Reviewed in the United States on March 6, 2021
Glass is light weight and fragile to the point that it breaks when you put cork in snuggly.
Craftsman
Reviewed in the United States on August 10, 2020
Nice large test tubes which include stopper corks and a cleaning brush. They seem sturdy and of good quality. So far none have broken, so the glass is of good quality.
Katie
Reviewed in the United States on June 18, 2019
Perfect. I was worried they might break during shipping but they were nicely packed and none of them broke (I ordered two sets) . I wanted to make a spice rack and it looks amazing
A. Harris
Reviewed in the United States on March 13, 2019
I was really pleased with these test tubes! They were packaged really well to ensure no broken ones would arrive. I ordered 100 of them, and not a single one was broken! We used them to make bath salts. Will order again!
stampmom9 Dawn Gallop
Reviewed in the United States on July 7, 2018
These are really nice however it was expected but two came broken. I used them to make the test tube salts. I even bought the tray to hold them.
Ritchie
Reviewed in the United States on January 13, 2018
out of 20 ... 1 came cracked
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