EISCO Cork Stoppers 10PK Size #2 9mm-13mm Natural Bark Tapered Lab

Description

Product Overview

The EISCO 10-pack of size #2 cork stoppers is engineered to meet the demanding standards of professional laboratories while also serving the practical needs of home users. Each stopper is precisely machined to a length of 17 mm, with a base diameter of 9 mm and a top diameter of 13 mm, creating a tapered profile that ensures a secure, leak‑free seal on a wide range of containers. Constructed from natural bark, the cork material offers inherent elasticity, compressibility, and resistance to chemical interaction, making it an ideal choice for sealing glassware, plastic bottles, and metal containers. The natural bark composition also provides a sustainable, renewable resource that biodegrades responsibly at the end of its useful life. These stoppers are packaged in a convenient 10‑piece pack, allowing users to maintain an inventory of spare seals for routine laboratory work, educational experiments, or hobbyist projects. The product dimensions of the packaging are compact, measuring 10 × 8 × 1 inches and weighing only 0.35 ounces, which facilitates easy storage in drawers, cabinets, or laboratory benches. With a manufacturer reputation backed by a 4.1‑star rating from 17 customer reviews, the EISCO cork stoppers have demonstrated consistent performance across a variety of applications, from sealing reagent bottles to preserving home‑brewed beverages.

Usage

These cork stoppers excel in environments where a reliable, airtight seal is essential. In scientific laboratories, they are commonly used to close reagent bottles, chromatography vials, and distillation apparatuses, preventing oxidation and contamination of sensitive chemicals. Their tapered design fits snugly into openings ranging from 10 mm to 12 mm, making them compatible with standard laboratory glassware such as Erlenmeyer flasks, beakers, and test tubes. Beyond the lab, the stoppers are equally effective for homebrew enthusiasts who need to seal fermenting beer or wine containers, ensuring proper carbonation and preventing spoilage. They also serve well in culinary settings for sealing spice jars, oil bottles, and homemade extracts, preserving freshness and aroma. In educational settings, teachers can employ these stoppers for hands‑on experiments that demonstrate gas exchange, pressure differentials, and the principles of sealing. The durability of natural bark means the stoppers can be inserted and removed repeatedly without crumbling, reducing waste and cost over time. Whether used in a professional research facility, a classroom, a kitchen, or a garage workshop, the EISCO cork stoppers provide a versatile, cost‑effective sealing solution that adapts to a broad spectrum of tasks.

Why Choose Us

Choosing EISCO cork stoppers means selecting a product that combines quality craftsmanship with practical functionality. The stoppers are sourced from responsibly managed forests, ensuring that the natural bark material is both renewable and environmentally friendly. Each stopper undergoes rigorous quality control checks to verify dimensions, elasticity, and surface integrity, guaranteeing that every piece meets the exact specifications required for a tight seal. The tapered shape is a result of precise engineering that balances ease of insertion with a firm grip, reducing the risk of accidental dislodgement during transport or storage. Additionally, EISCO provides responsive customer support that assists users with product inquiries, troubleshooting, and replacement requests, reinforcing confidence in the purchase. The company’s commitment to continuous improvement is reflected in its consistent ranking within the top tier of lab corks on major e‑commerce platforms, as evidenced by its Best Sellers Rank of #30 in the Lab Corks category. By opting for EISCO, customers benefit from a product that delivers reliable performance, sustainability, and a trusted brand reputation, all at an affordable price point.

Key Features

• Premium natural bark material provides elasticity and long‑term durability for repeated use.
• Tapered #2 size (17 mm × 9 mm × 13 mm) fits a wide range of bottle, flask, and tube openings securely.
• Pack of ten ensures you always have spare stoppers for laboratory, classroom, or home projects.
• Eco‑friendly, renewable source reduces environmental impact compared to synthetic alternatives.
• Responsive EISCO customer support offers assistance, replacements, and product guidance.

FAQ

What types of containers can these cork stoppers seal?

They are designed to fit openings between 10 mm and 12 mm, making them suitable for glass bottles, flasks, test tubes, spice jars, and home‑brew containers.

Are the cork stoppers reusable?

Yes, the natural bark material is resilient and can be inserted and removed many times without breaking or losing its sealing ability.

Can these stoppers be used with chemicals?

They are compatible with most laboratory chemicals, but for highly corrosive substances it is recommended to verify chemical resistance before prolonged exposure.

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

Keep them in a cool, dry place away from direct sunlight. Storing them in a sealed container helps preserve their elasticity.

Do you offer bulk pricing for larger orders?

EISCO provides volume discounts for bulk purchases; please contact customer service for a customized quote based on your needs.