EISCO Stopper Flat Head Solid Cone Borosilicate Glass Size 24/29

Description

Product Overview

The EISCO flat head stopper is engineered for precision laboratory environments where reliability and chemical resistance are paramount. Constructed from premium borosilicate glass, the stopper offers superior thermal stability, resisting sudden temperature changes without cracking, and provides excellent resistance to a broad spectrum of chemicals, including acids, bases, and solvents. Its solid cone geometry ensures a uniform pressure distribution across the joint, while the flat head design simplifies alignment and reduces the risk of uneven seating. The stopper conforms to a 24/29 joint size, a standard dimension for many laboratory glassware pieces such as flasks, condensers, and distillation apparatus, guaranteeing a tight, leak‑free seal that maintains system integrity during experiments. The product dimensions are compact, measuring 5.2 x 2.48 x 1.69 inches and weighing only 1.6 ounces, making it easy to handle and store. With a model number CH0872D, this stopper is part of EISCO’s extensive line of laboratory consumables, reflecting the company’s commitment to quality and consistency. Its design eliminates the need for additional sealing accessories, streamlining setup time and reducing overall laboratory costs. The stopper’s clear glass construction also allows visual inspection of the sealing surface, enabling quick detection of wear or damage, which further enhances safety and operational efficiency.

Usage

Designed for a variety of laboratory applications, the EISCO flat head stopper excels in both academic and industrial settings. It is ideal for use in chemistry labs, biology research facilities, pharmaceutical development, and quality‑control testing environments where precise fluid handling and containment are critical. The stopper’s robust borosilicate composition makes it suitable for high‑temperature distillation, reflux setups, and vacuum filtration processes, providing confidence that the seal will remain intact under demanding conditions. Researchers frequently employ this stopper in titration experiments, where accurate volume measurements depend on a secure seal to prevent vapor loss. Additionally, its flat head facilitates easy insertion into standard glass joints, reducing the time required for assembly and minimizing the risk of cross‑threading or misalignment. The stopper is also compatible with a range of accessories, such as clamps and adapters, allowing seamless integration into complex apparatuses. For educational laboratories, the clear glass offers a visual teaching tool, helping students understand the mechanics of sealing and the importance of proper joint selection. In industrial quality‑control labs, the stopper’s durability ensures consistent performance across repeated use cycles, supporting rigorous testing protocols and compliance with industry standards.

Why Choose Us

Choosing the EISCO flat head stopper means selecting a product backed by decades of expertise in laboratory consumables. EISCO adheres to stringent manufacturing standards, employing automated glass forming processes that guarantee uniform wall thickness and dimensional accuracy for every unit. Each stopper undergoes rigorous quality inspections, including visual checks for surface imperfections and mechanical testing to confirm the integrity of the cone and head geometry. The company provides comprehensive documentation, including material safety data sheets (MSDS) and certification of compliance with international standards such as ISO 9001, ensuring that users have full confidence in the product’s safety and performance. EISCO’s customer support team offers technical assistance for proper selection and usage, helping laboratories optimize their workflows and troubleshoot any sealing challenges. Moreover, the brand’s extensive distribution network ensures rapid delivery and reliable availability, minimizing downtime for critical experiments. By investing in EISCO products, laboratories benefit from a combination of high‑quality materials, precise engineering, and responsive service that together deliver long‑term value and operational excellence.

Key Features

• Premium borosilicate glass provides exceptional chemical resistance and thermal stability.
• Flat head design ensures easy alignment and quick insertion into standard 24/29 joints.
• Solid cone shape delivers uniform pressure distribution for a leak‑free seal.
• Compact size and lightweight construction facilitate handling and storage.
• Dedicated EISCO customer support offers technical guidance and after‑sales assistance.

These features collectively enhance laboratory efficiency, reduce setup time, and improve experimental reliability. The stopper’s clear glass allows visual monitoring of the sealing surface, helping users detect wear before it impacts performance. Its compatibility with a wide range of glassware and accessories makes it a versatile component in any lab inventory. By delivering consistent sealing performance, the stopper helps maintain the integrity of sensitive reactions and analytical procedures, ultimately contributing to higher quality data and reproducible results.

FAQ

What types of chemicals can the stopper resist?

The borosilicate glass construction resists most acids, bases, and organic solvents commonly used in laboratory settings, including hydrochloric acid, sodium hydroxide, and ethanol.

Can the stopper be used under vacuum conditions?

Yes, the solid cone design and tight fit of the flat head provide a reliable seal that can withstand moderate vacuum levels without leakage.

Is the stopper compatible with high‑temperature applications?

Absolutely. Borosilicate glass tolerates rapid temperature changes and can be used in distillation or reflux setups that involve heating up to 300 °C.

How do I know if the stopper needs replacement?

Inspect the glass for cracks, chips, or discoloration. Any visible damage or loss of clarity at the sealing surface indicates that the stopper should be replaced to maintain a proper seal.

What is the warranty or guarantee on this product?

EISCO offers a limited warranty covering manufacturing defects for a period of one year from the date of purchase, ensuring that any quality issues are addressed promptly.