These EISCO neoprene stoppers are lab-grade quality that both professionals and hobbyists can rely on. This 10-pack of #0 size stoppers with single 5mm holes is perfect for all kinds of scientific experiments and setups.
Made from durable neoprene rubber that stands up to tough conditions, these stoppers can handle temperatures from -40 to 130°C and are resistant to petroleum products, oils, fats, and most inorganic acids and bases. That's some serious chemical resistance!
Each stopper measures 25mm in length with a 14mm base diameter and 19mm top diameter, manufactured to ASTM standards for consistent, reliable performance. The blue color makes them easy to identify in your lab setup or storage.
Whether you're setting up distillation apparatus, creating custom lab equipment, or working on educational science projects, these stoppers provide secure, leak-resistant seals. EISCO manufactures their own products with quality control in mind, so you're getting professional-grade laboratory supplies that perform consistently.
Free 30-day returns 
Free 30-day returns
