It are high-quality laboratory glassware components designed to provide a secure and reliable connection in a variety of laboratory applications. Made from durable, chemical-resistant glass, these sockets are ideal for use in distillation, filtration, and other chemical processes. The NS 45/40 joint size ensures a tight and precise fit with compatible glassware, allowing for seamless integration and optimal performance. These sockets are essential for laboratories requiring strong and reliable connections for their scientific experiments.