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Your cart is empty.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. Black rubber stoppers. Solid, regular length. For all general laboratory and other uses. Dimensions in accordance with NBS specifications. Size: 10, Top Diameter: 49 - 50mm, Bottom Diameter: 41 - 42mm, Length: 25mm
Tom/Michigan
Reviewed in the United States on March 10, 2025
Worked perfectly
niteman131
Reviewed in the United States on January 22, 2025
These stoppers are very dense (in a good way), and are the proper size. My plan was to drill two holes in the stoppers, however, I have never drilled through dense, thick rubber before. After reading up on how to drill the holes, I realized it requires a few tools and methods I've not used before; (a "hollow core" drill bit, freezing the stoppers", a drill press, and a method to hold the stoppers securely while drilling at low speed).Due to the "extra methods" required, I figured out an easier way to do my project. I will probably find a use for the stoppers in the future, but I should have looked into the methods for drilling the stoppers before ordering... Live and Learn !
Mark
Reviewed in the United States on August 8, 2024
I use these for a home made watering system using 5 gallon buckets and drip lines. They plug well and nothing leaks!
hillalu
Reviewed in the United States on August 15, 2024
Works well to cap vessels in my garden planters.
John Darling
Reviewed in the United States on May 26, 2024
These are stars size13 stoppers. Worked great to plug up a barrel top for me
walkrdg
Reviewed in the United States on August 17, 2023
Bought these for a project I'm building. Pleased for the quality of shape with no ragged edges, and they're solid. Just what I needed.
Butch
Reviewed in Canada on November 11, 2023
Used to winterized our swimming pool. Fit the outflow hole perfectly.
mike000mike
Reviewed in the United States on November 14, 2021
As long as you know your sizing these are good use corks but I would use them in industrial and not food based product use. The smell was overwhelming and didn't know when they would wash off or if that would impact something like using it as a stopper in a carafe for water
Michael Roberts
Reviewed in Canada on November 6, 2020
Exactly as described. Good service and product.
Tom
Reviewed in Canada on March 16, 2019
I needed to drill 2 1/2 inch holes in a device and used these plugs to stop leakage. They worked!!
Linda Tulk
Reviewed in Canada on December 21, 2018
Used to hold tape on reel to reel tape recorder
M1K3 FR0M D3TR01T
Reviewed in the United States on May 11, 2017
These three rubber stoppers fit into my new German made Corning flask.Just a note Iif you're ordering a bunch of different stoppers for a large project: cork stoppers use a different sizing system than rubber stoppers apparently. Luckily my flask had "7 stopper" written right on it from the factory. That's the RUBBER stopper size.Anyway, this squishes down about 2/3 into the flask's neck nicely. I'm just using this to stopper boiled water for a sonoluminescence project. Some stoppers can fit too well, then if the liquid inside the flask cools it will suck the stopper into the flask completely! Lol, I think these will be ok.The stoppers didn't feel or smell unusual...although they do have that tire store smell, it dissipates rapidly. Sometimes you'll find a stopper that is greasy, like the rubber is breaking down toa sludge or something. Coming from working on a plasma fusor demo model I'm used to silicone stoppers, but these also seem nice and inert.Yep, good old non-descript stoppers. No drama involved. I just realized I should have been a writer paid by the word instead of a stupid librarian: Stopper = good. You get 3 of them.Michael from DetroitScience and optics
Kurt
Reviewed in Canada on September 3, 2016
Works good!
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