CS-9-100 Cork Stopper, Size 9 (Pack of 100)

Description

Product Overview

The CS-9-100 cork stopper collection from GSC International is engineered for laboratory precision and durability. Each stopper is crafted from natural cork, a renewable material known for its lightweight yet resilient structure. Measuring roughly 9/8 inches in height, with a top diameter of 59/64 inches and a bottom diameter of 47/64 inches, these stoppers fit standard glassware openings commonly found in chemistry, biology, and physics labs. The pack contains 100 individual stoppers, providing ample supply for routine experiments, large‑scale projects, or educational settings. Natural cork’s inherent micro‑pores allow a modest amount of gas exchange, which can be advantageous in certain experimental conditions while still preventing major leaks or evaporation. The product dimensions of 0.92 x 0.92 x 1.13 inches and a weight of just 0.05 ounces per stopper make them easy to handle, store, and transport. Designed with a focus on consistency, each stopper meets strict quality standards to ensure uniform performance across the entire batch.

Usage

These size‑9 cork stoppers excel in a variety of laboratory environments. In chemistry labs, they securely seal test tubes and flasks during reactions that generate volatile compounds, reducing the risk of spills and maintaining reaction integrity. In biology classrooms, instructors rely on them to close culture vessels, allowing students to observe microbial growth without contamination. The stoppers are also valuable for physics demonstrations involving buoyancy and density, as their natural buoyancy provides a clear visual cue when placed in water or other fluids. Beyond traditional lab use, the stoppers can be adapted for custom apparatuses—such as holding thermometers, pipettes, or glass tubing—making them a versatile component for DIY experimental rigs. Their food‑safe nature permits use in food science experiments where contact with consumables is required. The pack of 100 ensures that labs can maintain a consistent inventory, minimizing downtime caused by missing or mismatched stoppers.

Why Choose Us

Choosing GSC International means selecting a supplier with a proven track record in laboratory consumables. Our cork stoppers undergo rigorous inspection to verify dimensions, density, and absence of critical defects, guaranteeing that each piece performs as expected. The natural cork source is sustainably harvested, aligning with environmentally conscious laboratory practices. We provide transparent product information, including detailed specifications and customer reviews, so buyers can make informed decisions. Our commitment to after‑sales support includes responsive customer service, easy returns, and technical assistance for any application‑specific questions. With a Best Sellers Rank of #57 in Lab Corks, the CS‑9‑100 set has earned the confidence of researchers worldwide, reflected in a 4.4‑star rating from over 30 verified purchasers. By offering a competitive price of $37.88 for a 100‑piece pack, we deliver both value and quality, helping institutions allocate resources efficiently while maintaining high experimental standards.

Key Features

• Consistent size‑9 dimensions ensure a reliable fit for standard laboratory glassware.
• Natural cork provides a balance of airtight sealing and limited airflow for controlled reactions.
• Lightweight and easy to handle, reducing fatigue during repetitive setup tasks.
• Food‑safe material expands usability to food science and culinary research applications.
• Dedicated customer support and hassle‑free returns for peace of mind after purchase.

FAQ

What is the difference between natural cork and synthetic cork stoppers?

Natural cork is harvested from the bark of cork oak trees and retains a porous structure that allows limited gas exchange, which can be beneficial for certain experiments. Synthetic corks are made from polymer materials and typically provide a more airtight seal but lack the renewable, biodegradable qualities of natural cork.

Can these stoppers be used with high‑temperature applications?

Natural cork can tolerate moderate temperatures up to about 120 °C (248 °F) without significant degradation. For experiments requiring higher heat resistance, a synthetic alternative may be more appropriate.

How should I store the cork stoppers to maintain their quality?

Store the stoppers in a cool, dry environment away from direct sunlight. Keeping them in a sealed container helps prevent moisture absorption, which could affect their sealing performance.

Are the stoppers compatible with standard laboratory equipment?

Yes, the size‑9 dimensions are designed to fit common test tube and flask openings found in most academic and industrial labs. Always verify the opening size of your specific glassware before use.

What warranty or guarantee does GSC International provide?

We offer a 30‑day satisfaction guarantee. If the stoppers arrive damaged or do not meet the described specifications, contact our support team for a replacement or refund.