Description

The solid construction ensures a tight fit, providing a secure closure that helps maintain sample purity and prevents atmospheric contamination.
This pennyhead stopper is specially crafted to fit seamlessly into standard laboratory glassware with ground-glass joints. The term “pennyhead” refers to the flat, circular top that resembles the head of a coin, which offers an ergonomic grip and allows easy handling during insertion and removal. Its round head shape also ensures balanced pressure distribution, reducing the risk of chipping or breakage during routine use. The stopper’s polished, ground-glass surface ensures a snug fit that forms an airtight seal without the need for additional sealing agents, thereby minimizing the risk of contamination or reagent loss through evaporation.
Made from borosilicate glass, the stopper is both chemically inert and thermally stable, making it ideal for use with a wide variety of acids, bases, solvents, and other reactive compounds. This material composition allows the stopper to perform reliably under various laboratory conditions, including high-temperature sterilization processes such as autoclaving. As a result, it offers excellent reusability while maintaining the integrity of the substances stored. The clear white color of the stopper contributes to a clean, professional appearance and allows for easy visual inspection for residues or contaminants.
The 50 ml capacity compatibility makes this stopper particularly useful for small-volume laboratory containers, making it ideal for precise scientific work such as titrations, quantitative analysis, and sample storage. Laboratories involved in chemistry, biology, pharmacology, and environmental science can rely on this stopper for secure and stable sample containment. Whether used in academic, research, or industrial labs, this stopper ensures that critical reagents and solutions remain uncontaminated and preserved during both short-term and long-term storage.
In addition to its technical features, the solid ground glass pennyhead stopper supports a wide range of laboratory operations by ensuring standardized fitting and interchangeability across compatible labware. Its low-maintenance design allows for quick cleaning and sterilization, reducing turnaround time between experiments. Furthermore, it eliminates the need for plastic or rubber alternatives, offering a more sustainable and environmentally friendly option for labs aiming to reduce non-recyclable waste.
In summary, the Solid Ground Glass Pennyhead Stopper designed for 50 ml laboratory bottles offers a perfect balance of durability, chemical resistance, and sealing efficiency. Crafted from high-grade borosilicate glass and featuring a round pennyhead design, this stopper ensures a secure fit, easy handling, and optimal sample protection. Ideal for laboratories that demand precision, reliability, and high performance in sealing and storing small-volume samples, this stopper is an indispensable tool for maintaining accuracy and integrity in scientific research and experimentation.