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These are LDPE Lab ware
They don't leak, even after a long time.
a good liquid proof seal
Stacy Brumley
Reviewed in the United States on July 12, 2024
I used these to hide geocaches and they are perfect.
ClaytonJ
Reviewed in the United States on May 23, 2024
These are very useful!
Virginia
Reviewed in the United States on February 27, 2024
Works great just what I needed.
David
Reviewed in the United States on November 3, 2024
If you're using these for purposes other than centrifuging, they're great. They also seem fine at 10 k g for up to ~3 minutes. On longer runs, they will always rupture in the centrifuge. I've had it happen for runs at 5 mins, but generally it happens at about the 8-15 minute mark. Sometimes it will just tear the lid off and spray your sample all over. Sometimes the tube will fragment into many tiny pieces.
Tracy
Reviewed in the United States on November 2, 2024
Hello i purchased these tube's just a week ago. The first progesterone test I've done the plasma thickened. Which is not the process. Never purchased these before because my previous ones came with my progesterone machine. But they look to be the exact same as those. Should I somehow clean these before use? Have they been coated with any sort of chemical?
Dalia R.
Reviewed in the United States on October 22, 2024
I have to store samples in these, but they don't close properly
G Naoma R
Reviewed in the United States on April 19, 2024
I didn’t buy these for use with a centrifuge.I bought them to use the caps as water dishes for tiny invertebrates.That said, they seem good. The caps all seem to fit their tubes well. Each one has so far been identical to the next; no irregularities in the manufacture. The plastic is firm but flexible and a good thickness. I imagine they’d work well for their intended purpose.They also work very well as tiny water dishes:I cut the caps off the tubes, trim the cut sections so they’re smooth and set them on their tops. The wide brim makes them easy to open, but also makes a great base. The round section of the cap, that sits inside the tube’s opening and seals it when closed, makes a perfect reservoir for a few drops of water. Great for 1/4” - 1/2”, maybe up to 3/4” tarantula spiderlings who need access to water but misting regularly may make their environment too damp.If the strip of plastic connecting the cap to the tube were cut to a point, it could also be used to sort of stab into a bit of cork to mount the cap higher up for an arboreal spiderling or other small invertebrate. Again, the wide brim on the cap comes in handy as an extra foothold for the animal to stand on while drinking.Got the idea from Dave’s Little Beasties. I haven’t seen any of my slings drinking from them, but better to have access to water and not need it, than need it and not have it. They’re babies and they’re still quite shy. What they get up to after the lights have gone out, who can say? They may drink from these regularly and I just haven’t seen it. Either way, I feel better knowing they have it if they want it. Especially when they’re coming up to a molt and refusing food. Internal hydration is far more important than the ambient humidity when it comes to spiders molting. (Ambient humidity is still important, but…)Anyway, whatever you use these for, they should likely work well for you.
Preston Gibson
Reviewed in the United States on January 9, 2022
Just a bunch of cheap centrifuge tubes. The connection between the cap and the tube can be fragile, but that doesn't really matter. They don't seem to leak, even after a long time.
William K.
Reviewed in Canada on July 26, 2021
On time. Good for storing seeds, and other things.
Kat
Reviewed in Canada on May 13, 2021
It came as they described it
Colin Brittan
Reviewed in Canada on August 7, 2020
These were bigger than I originally expected, but not disappointed at all.I use these to hold various seeds for gardening. The larger size allows me to pack many more seeds in each tube.Volume measurements on the size are handy.I would buy these again before looking elsewhere.
TFG
Reviewed in Canada on April 18, 2019
ordered 100 pcs and only got 94....other than that ok
Allan A
Reviewed in the United Kingdom on March 14, 2016
good product , can be used for many things other than tests , clear graduations on the side and a good seal . ideal for keeping small items clean and dry like tablets ,lotions, powders or creams
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