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50ml Centrifuge Tube, PP Material,Printed Graduation, Blue Cap, Conical Bottom, No-Leak, Non-Sterile, Karter Scientific 208L2 (Pack 50)

3.6 3.6 out of 5 stars 41 ratings
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Product Description

Centrifuge Tube, Vol. 50ml. Diam.30x115mm. Blue screw cap, Leak-proof. PP material, Conical bottom, Printed. Graduation interval 2.5ml. Graduation range: 5-45ml. Bulk pack. Non-sterile,

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Package Dimensions ‏ : ‎ 12.1 x 11.9 x 3.4 inches; 1 Pounds
  • Date First Available ‏ : ‎ October 24, 2011
  • Manufacturer ‏ : ‎ Karter Scientific
  • ASIN ‏ : ‎ B005Z4S3ZU
  • Customer Reviews:
    3.6 3.6 out of 5 stars 41 ratings

Product information

Technical Details

Additional Information

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50ml Centrifuge Tube, PP Material,Printed Graduation, Blue Cap, Conical Bottom, No-Leak, Non-Sterile, Karter Scientific 208L2 (Pack 50)

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Customer reviews

3.6 out of 5 stars
41 global ratings

Customers say

Customers appreciate the value, durability, and functionality of the product. They mention it's well-made, holds up wear, and works great for their purposes. However, some customers have reported that the tubes leak and the white markings on the tube smudge off easily.

AI-generated from the text of customer reviews

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Value for moneyDurabilityFunctionalityLeakageMarkings
7 customers mention "Value for money"7 positive0 negative

Customers appreciate the value for money of the product. They say it's well-made, has excellent performance, and is definitely worth the price.

"great price. water tight. durable. overall good deal" Read more

"...was a bit surprised by this, but for the price this product is definitely worth it." Read more

"...They're a standard size, easy to store, and cheap enough that I don't feel bad if I decide to throw one or two out instead of trying to clean them...." Read more

"These tubes are well made and a great value. Highly recommend them." Read more

5 customers mention "Durability"5 positive0 negative

Customers are satisfied with the durability of the tubes. They mention they're well-made and hold up well to wear. However, some customers say the labels and numbers rub off.

"great price. water tight. durable. overall good deal" Read more

"These tubes are well made and a great value. Highly recommend them." Read more

"...I'm a cheapskate, and these tubes are cheap, but definitely not equivalent to the slightly more expensive vwr brand tube with the rubber seal." Read more

"Held up wear but labels/numbers rub off..." Read more

5 customers mention "Functionality"5 positive0 negative

Customers are satisfied with the functionality of the product. They mention it works great for geocache hides, is useful, and well-made.

"...of these tubes in a home-made salad spinner centrifuge and they worked well...." Read more

"...Works well for folch method, www.cyberlipid.org/extract/extr0005.htm highly resistant to chloroform:methanol, and many other solvents used it the..." Read more

"...Other than that they worked well." Read more

"These worked great for my purpose which was geocache hides. I like the size because it'll hold a log and small pencil...." Read more

5 customers mention "Leakage"0 positive5 negative

Customers are dissatisfied with the leakage of the product. They mention the caps don't fit tightly.

"These are sold as leak-proof, however they leak from the lid with minimal mixing of the fluid inside...." Read more

"...They leak unless the caps are put on very tightly (using grippers). There is no liner in the cap which could help with the sealing...." Read more

"Some of them kinda leak." Read more

"If you invert the tube, the cap leaks. If you write on the label with a sharpie marker, the ink diffuses and becomes blurry...." Read more

3 customers mention "Markings"0 positive3 negative

Customers are dissatisfied with the markings of the product. They mention the white markings on the tube smudged off during use in a water bath, and the label and mL numbers/markings rubbed off easily.

"...times and using it with some oily products, the label and mL numbers/markings rubbed off...." Read more

"...The printed markings on the outside rub off easily. Overall, there's not much good to say about these tubes...." Read more

"All of the white markings on the tubes smudged off during use in a water bath. Other than that they worked well." Read more

Top reviews from the United States

Amazon Customer
5.0 out of 5 stars Five Stars
Reviewed in the United States on December 4, 2015
Verified Purchase
great price. water tight. durable. overall good deal
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Teisha J Rowland
4.0 out of 5 stars Held up wear but labels/numbers rub off
Reviewed in the United States on August 8, 2012
Verified Purchase
I used several of these tubes in a home-made salad spinner centrifuge and they worked well. However, after re-using the same tube several times and using it with some oily products, the label and mL numbers/markings rubbed off. I was a bit surprised by this, but for the price this product is definitely worth it.
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NaturesKid
5.0 out of 5 stars Very useful and well manufactured centrifuge tubes.
Reviewed in the United States on September 16, 2015
Verified Purchase
50 ml conical polypropylene tubes come in handy for chemical extractions of lipids from various tissues. Works well for folch method, www.cyberlipid.org/extract/extr0005.htm highly resistant to chloroform:methanol, and many other solvents used it the lab.Karter Scientific 208L2 Centrifuge Tubes, 50ml, 30x115mm, Blue Cap, Conical, No-Leak (Pack of 50)
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Foxglove
1.0 out of 5 stars They leak
Reviewed in the United States on September 6, 2012
Verified Purchase
These are sold as leak-proof, however they leak from the lid with minimal mixing of the fluid inside. I run a research lab and was surprised to see these so cheap, but I guess you get what you pay for. Stick with BD, etc for higher quality ones. Mine all are going back to amazon.
6 people found this helpful
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Wombat37
2.0 out of 5 stars Cheap
Reviewed in the United States on October 9, 2014
Verified Purchase
The best thing about these tubes is that they are cheap. I got them to store yeast samples for homebrewing in my freezer. They are not sterile like the more expensive ones so I have to sanitize them before use. They leak unless the caps are put on very tightly (using grippers). There is no liner in the cap which could help with the sealing. The printed markings on the outside rub off easily. Overall, there's not much good to say about these tubes.

However, they do the job but next time I think I'll pay a bit more and get a better quality product.
2 people found this helpful
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MilliMeter
3.0 out of 5 stars Three Stars
Reviewed in the United States on July 11, 2015
Verified Purchase
Some of them kinda leak.
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J. Beeler
5.0 out of 5 stars Perfect for homebrewing
Reviewed in the United States on July 9, 2015
Verified Purchase
I bought these as a convenient way to store yeast for homebrewing. They're a standard size, easy to store, and cheap enough that I don't feel bad if I decide to throw one or two out instead of trying to clean them. All said, a great purchase.
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M. Warner
4.0 out of 5 stars Great value tubes.
Reviewed in the United States on April 21, 2016
Verified Purchase
These tubes are well made and a great value. Highly recommend them.
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Top reviews from other countries

Ashley
5.0 out of 5 stars Five Stars
Reviewed in Canada on January 25, 2018
Verified Purchase
Can't go wrong with the price. Buy these all the time.
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Andrew Martin
5.0 out of 5 stars Affordable quality
Reviewed in the United Kingdom on July 26, 2015
Verified Purchase
Great quality and excellent service
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