It are high-quality, durable stoppers designed for laboratory use. Made from polyethylene (PE), these violet-colored stoppers provide a secure seal for laboratory glassware, ensuring reliable closure and preventing contamination. The conical shape allows for a tight fit, making them ideal for use with a variety of containers, including test tubes, flasks, and bottles. Each pack contains 10 stoppers, offering excellent value for laboratories requiring multiple closures. These stoppers are resistant to chemicals and temperature changes, making them suitable for a wide range of laboratory applications.