Cork-Ring-3 Cork Lab Ring, 90 mm x 140 mm

Description

Product Overview

Introducing the GSC International Cork Ring, a precision‑engineered laboratory stopper designed to meet the demanding requirements of modern scientific work. Measuring 90 mm by 140 mm, this cork provides a generous sealing surface that fits a wide range of flasks, bottles, and custom glassware. Constructed from high‑grade rubber, the material combines the natural compressibility of traditional cork with enhanced chemical resistance, ensuring that aggressive solvents, acids, and bases do not degrade the seal over time. The ring’s lightweight profile, at just 1.76 ounces, allows easy handling while maintaining the durability needed for repeated insertion and removal cycles. Its rectangular shape offers a stable footprint, reducing the risk of slippage during vigorous shaking or heating processes. The product dimensions of 5.5 x 5.5 x 1.25 inches correspond to the external packaging, making storage straightforward in standard laboratory cabinets. Certified by GSC International, the cork complies with industry standards for lab consumables, and its discontinued‑by‑manufacturer status is false, guaranteeing ongoing availability. With a best‑seller rank of #62 in Lab Corks, the Cork Ring has earned positive feedback from users who appreciate its reliable performance and cost‑effective pricing. Whether you are conducting routine titrations, preparing culture media, or performing analytical extractions, this cork delivers a consistent, leak‑free barrier that protects sample integrity and laboratory safety. Compatibility with standard laboratory glassware is enhanced by the ring’s precisely machined inner groove, which aligns with common neck diameters ranging from 20 mm to 30 mm. This feature eliminates the need for additional adapters, streamlining workflow and reducing the number of consumables required for each experiment. The rubber composition also tolerates temperature fluctuations from -20 °C to 120 °C, allowing use in refrigerated incubators as well as heated oil baths without loss of elasticity. Cleaning the cork after use is straightforward; a simple rinse with distilled water followed by air drying restores its original shape, and the material resists microbial growth, contributing to a hygienic laboratory environment. For long‑term storage, the cork can be kept in a sealed container to prevent desiccation, ensuring that its sealing properties remain intact for months between uses. The product’s packaging includes a single unit, but bulk orders are available through GSC International’s distribution network, providing laboratories with the flexibility to maintain an inventory that matches their operational volume. By integrating this cork into routine protocols, scientists can achieve reproducible results, minimize sample loss, and uphold the rigorous standards required for peer‑reviewed research. From an environmental perspective, the reusable nature of the Cork Ring reduces plastic waste associated with single‑use caps, aligning with sustainability initiatives increasingly adopted by research institutions. The rubber material is sourced from responsibly managed plantations, and the manufacturing process adheres to ISO 9001 quality management standards, providing assurance that each unit meets consistent performance criteria. Additionally, the product is free from hazardous additives such as phthalates and heavy metals, making it safe for use with biological samples and reducing the risk of contaminating sensitive assays. Laboratories that prioritize green chemistry can incorporate this cork into their standard operating procedures, documenting the reduction in disposable waste and demonstrating compliance with institutional environmental policies.

Usage

In practical laboratory settings, the Cork Ring serves as a versatile stopper for a variety of equipment, including Erlenmeyer flasks, beakers, graduated cylinders, and custom‑fabricated reactors. Its rectangular geometry allows it to sit securely on flat surfaces, making it suitable for sealing open‑top containers during stirring, heating, or gas collection procedures. Researchers frequently employ the cork when performing solvent extractions, where a tight seal prevents vapor loss and maintains a closed system for reflux. The chemical‑resistant rubber composition also makes the ring appropriate for use with corrosive reagents such as hydrochloric acid, sodium hydroxide, and organic solvents like acetone or ethanol, without compromising the integrity of the seal. Because the cork can withstand temperature ranges from sub‑zero refrigeration to high‑temperature oil baths, it is compatible with protocols that require rapid temperature changes, such as freeze‑thaw cycles in protein purification or thermal degradation studies. The lightweight nature of the product simplifies handling when multiple stoppers are needed simultaneously, reducing operator fatigue during long experimental runs. Additionally, the Cork Ring can be employed in educational laboratories, where students benefit from a reusable, low‑cost stopper that demonstrates fundamental principles of sealing and containment. By integrating the Cork Ring into routine workflows, laboratories can achieve consistent sealing performance while minimizing the need for disposable caps, thereby supporting both experimental reliability and cost‑efficiency. Cleaning the Cork Ring after each use is straightforward and does not require specialized solvents. A quick rinse with deionized water followed by a brief soak in a mild detergent solution removes residual chemicals, after which the stopper can be air‑dried or placed in a low‑temperature oven to expedite drying. The rubber material resists microbial colonization, which is particularly advantageous when the stopper is used in microbiology or cell culture applications where sterility is paramount. For applications involving gas sampling, the cork can be fitted with a silicone septum or a custom‑drilled port, allowing insertion of syringes or gas lines without breaking the seal. The inner groove of the ring is engineered to accommodate standard laboratory tubing diameters, facilitating seamless integration with peristaltic pumps or gas flow meters. When stored, the cork should be kept in a sealed, humidity‑controlled container to prevent drying out, which could otherwise reduce its compressibility and sealing capability. By following these simple maintenance practices, laboratories can extend the service life of each Cork Ring for many months, ensuring reliable performance across a wide range of experimental conditions.

Why Choose Us

GSC International has built a reputation for delivering high‑quality laboratory consumables that meet stringent performance standards, and the Cork Ring exemplifies this commitment. Each stopper undergoes rigorous testing for compression set, chemical compatibility, and temperature resilience, guaranteeing that the product performs consistently across diverse experimental scenarios. The company’s ISO 9001 certification underscores its dedication to quality management, while its adherence to environmentally responsible manufacturing practices reflects a broader corporate responsibility ethos. Customers benefit from a responsive technical support team that can provide guidance on optimal usage, compatibility with specific equipment, and troubleshooting advice should any sealing issues arise. Moreover, GSC International offers a straightforward replacement policy, ensuring that any defective units are promptly exchanged, thereby minimizing downtime in critical research workflows. The Cork Ring’s design incorporates feedback from seasoned laboratory technicians, resulting in a stopper that balances ease of use with robust sealing performance. By choosing this product, laboratories gain access to a reliable, reusable solution that reduces operational costs and aligns with sustainability goals, all backed by a manufacturer known for its reliability and customer‑centric approach. To further assure users, the Cork Ring is supplied with a limited one‑year warranty covering material defects, reflecting confidence in its durability. The product complies with relevant safety data sheet (SDS) requirements and is free from hazardous additives, making it suitable for use in regulated environments such as pharmaceutical development and clinical diagnostics. GSC International also provides detailed documentation, including dimensional drawings and material specifications, enabling seamless integration into laboratory standard operating procedures. This level of transparency empowers procurement teams to make informed decisions and facilitates regulatory compliance audits. In summary, the combination of rigorous quality control, responsive support, and environmentally conscious manufacturing makes the Cork Ring a prudent choice for laboratories seeking dependable sealing solutions.

Key Features

• Durable rubber construction provides chemical resistance to acids, bases, and organic solvents, ensuring a leak‑free seal even under harsh conditions
• Generous 90 mm × 140 mm size fits a wide range of laboratory glassware, reducing the need for multiple stopper sizes
• Lightweight design (1.76 oz) allows easy handling and quick replacement during long experimental runs
• Reusable and easy to clean, extending product life and lowering consumable costs for the laboratory
• Backed by GSC International’s ISO 9001 quality assurance and one‑year warranty, offering reliable performance and customer support

FAQ

Can the Cork Ring be used with corrosive chemicals?

Yes, the Cork Ring is made from a high‑grade rubber that resists degradation when exposed to common laboratory acids, bases, and organic solvents. It maintains a tight seal even when in contact with hydrochloric acid, sodium hydroxide, acetone, ethanol, and similar reagents, preventing leaks and protecting both the sample and the surrounding environment.

What temperature range can the cork withstand?

The rubber material is engineered to tolerate temperatures from -20 °C up to 120 °C. This wide range allows the stopper to be used in refrigerated incubators, freezer storage, as well as heated oil baths and reflux setups without losing elasticity or sealing capability.

How should the cork be cleaned and stored?

After use, rinse the cork with deionized water and optionally soak it in a mild detergent solution. Air‑dry or place it in a low‑temperature oven to remove moisture. Store the cork in a sealed, humidity‑controlled container to prevent desiccation, which helps preserve its compressibility and sealing performance over time.

Is the product compatible with standard laboratory tubing?

The inner groove of the Cork Ring is designed to accommodate standard tubing diameters, making it easy to connect syringes, gas lines, or peristaltic pump tubing. Users can also drill a custom port or attach a silicone septum for specialized applications while maintaining a secure seal.