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Your cart is empty. Pack of ten #4 stoppers made of long lasting neoprene rubber. Blue color. Each stopper features one hole measuring 5mm in diameter. Manufactured according to sizes recommended by ASTM standards. Each stopper measures 25mm in length, has a base diameter measuring 20mm, and a top diameter measuring 26mm. The neoprene rubber construction is suitable for use with petroleum products, minerals, oils and fats, as well as most inorganic acids and bases. Resistant to temperatures ranging from -40 to 130°C.
Eisco Labs proudly manufactures its own products using state-of-the-art equipment, and following the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind.
Nike
Reviewed in the United States on October 10, 2024
I bought these to fit Pitsco 2 litre bottles that my students are using to make water filters. They fit perfectly.
Azure Pathways
Reviewed in the United States on August 16, 2022
I used this product for reel to reel spool stoppers. Needed 5mm hole.
kmarinelli
Reviewed in the United States on December 3, 2022
They are exactly what was advertised.
Victor Costello
Reviewed in the United States on January 14, 2021
None
Martin S.
Reviewed in the United States on May 2, 2020
I thought I had ordered the correct size after using several measuring processes. However, damn it did not work. The good news. I am using these for another project I have going on so they will not go to waist. The quality is great and the blue sets off the bottles I am using them in.
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