Rubber Stoppers Newflager Natural Rubber Lab Plug 11 Sizes 000#-8#

Description

Product Overview

The Newflager 21-pack of solid natural rubber stoppers is engineered to meet the demanding needs of modern laboratories. Crafted from premium-grade natural rubber, each stopper offers exceptional elasticity, chemical resistance, and a smooth surface that ensures a secure, leak‑proof seal across a wide range of glassware. The assortment includes eleven distinct sizes, from the smallest 000# to the larger 8#, providing comprehensive coverage for flasks, test tubes, burettes, and other common laboratory vessels. The packaging is thoughtfully organized: five pieces of the smallest 000# stopper, two pieces each of sizes 00# through 4#, and a single piece for each of the larger sizes 5# through 8#. This configuration guarantees that researchers have the exact size they need without excess inventory, optimizing both cost efficiency and workspace organization.

Technical specifications highlight the product’s practicality: each stopper measures according to industry standards, with a weight of 8.78 ounces for the entire set and compact dimensions of 5.3 x 3.5 x 0.7 inches, making storage simple and space‑saving. The model number NF-8201 identifies this specific configuration within Newflager’s extensive catalog, and the product has earned a strong reputation, reflected in a 4.6‑star rating from over 790 verified customer reviews. Its best‑seller rank of #14 in the Lab Rubber Stoppers subcategory underscores its popularity among scientific professionals seeking reliable sealing solutions.

Usage

These rubber stoppers excel in a variety of laboratory settings, from academic research labs to industrial quality‑control facilities. Their natural rubber composition is compatible with a broad spectrum of chemicals, making them suitable for both aqueous and organic solutions. Whether you are conducting titration experiments, preparing concentrated reagents, or storing sensitive samples, the stoppers provide a dependable barrier against evaporation, contamination, and pressure fluctuations.

In educational environments, the diverse size range allows instructors to demonstrate proper sealing techniques across different apparatuses, reinforcing best practices for students. In pharmaceutical development, the tight seal helps maintain the integrity of volatile compounds, ensuring accurate assay results. The stoppers also perform well in environmental testing labs, where they can securely contain samples for analysis of pollutants or trace elements without risk of leakage.

Because the stoppers are made from natural rubber, they exhibit a pleasant tactile feel, facilitating easy insertion and removal without damaging delicate glassware. This user‑friendly characteristic reduces the likelihood of breakage, a common concern when handling fragile laboratory equipment. Moreover, the stoppers’ resilience to temperature variations enables their use in both ambient and refrigerated conditions, expanding their applicability across a wide range of experimental protocols.

Why Choose Us

Choosing Newflager means partnering with a manufacturer that prioritizes quality, consistency, and customer satisfaction. Each stopper undergoes rigorous testing to verify its dimensional accuracy, elasticity, and chemical compatibility, ensuring that every piece meets the exacting standards required for scientific research. The natural rubber material is sourced responsibly, providing a sustainable alternative to synthetic polymers while delivering superior performance characteristics.

Our commitment to excellence is reflected in the product’s durability; the stoppers retain their sealing properties even after repeated cycles of insertion and removal. This longevity translates into reduced replacement costs and less downtime for laboratory personnel. Additionally, Newflager offers responsive after‑sales support, ready to address any inquiries regarding product specifications, usage recommendations, or troubleshooting.

By selecting this 21‑pack, laboratories benefit from a comprehensive solution that eliminates the need to source individual stopper sizes from multiple suppliers. The streamlined procurement process saves time and simplifies inventory management, allowing scientists to focus on their core research activities. Our competitive pricing, combined with the high quality of the stoppers, delivers exceptional value for both small academic labs and large industrial facilities.

Key Features

• Eleven precise sizes (000#‑8#) cover all common laboratory glassware, ensuring a perfect fit for every application.
• Made from premium natural rubber for superior elasticity, chemical resistance, and a reliable, leak‑proof seal.
• Convenient packaging with multiple quantities of each size reduces inventory waste and simplifies ordering.
• Durable construction withstands repeated insertion and removal, extending product lifespan and lowering replacement costs.
• Dedicated Newflager customer support provides expert assistance and fast resolution for any product‑related questions.

FAQ

What chemicals are compatible with these rubber stoppers?

The natural rubber material is compatible with most aqueous solutions, mild acids, bases, and many organic solvents. For highly aggressive chemicals, we recommend consulting the material safety data sheet to confirm suitability.

Can the stoppers be autoclaved for sterilization?

Yes, the stoppers can be safely autoclaved at standard laboratory temperatures (121°C) for up to 30 minutes without compromising their elasticity or sealing performance.

How do I determine the correct size for my glassware?

Measure the inner diameter of the opening you wish to seal and compare it to the size chart provided by Newflager. The 000# size fits openings up to 0.5 mm, while the 8# size accommodates openings up to 12 mm. Selecting the closest size ensures an optimal seal.

Are these stoppers suitable for temperature-sensitive experiments?

Yes, the natural rubber composition remains flexible and maintains its sealing integrity across a wide temperature range, from refrigerated conditions (4 °C) up to typical laboratory heating (up to 80 °C).

What is the warranty or guarantee on this product?

Newflager offers a one‑year limited warranty covering manufacturing defects. If you encounter any issues related to material quality or performance, contact our support team for a replacement or refund.