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Reviewed in the United States on December 9, 2023
These work wonderfully well with the Eisco 50ml tubes. They fit with about 1-2mm gap, keeping the tubes verticle and with little play. The double level keeps them from swinging around. The bottom is not divited, but that doesn't matter with the double rack.I bought a few of these racks and I will get more. The only thing is they are not heat tolerant as they're some sort of lexan. That said, I've boiled the test tubes, dried them quickly and put them into the rack without ill effect - many times.I may eventually glue another strip of lexan to the back of the two racks to make an I-beam for longevity, but in a lab this wouldn't be needed.
Terry bullock
Reviewed in the United States on January 3, 2023
Bought this for a friend looks exactly shown in the picture
Mrs. Madtux
Reviewed in the United States on May 31, 2021
I make and sell bath salts in test tubes and I purchased two of these holders for holding them while I’m filling them and also to store upright until I sell them. My tubes are just under 1” diameter and these holders are the perfect size. They’ve made it so much easier.
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