It is a precision-engineered laboratory accessory designed for use with Duran desiccator bases of 100 mm internal diameter. Manufactured from Duran borosilicate glass 3.3, known for its excellent chemical resistance and durability, this lid features an integrated tubulature compatible with NOVUS stopcock assembly (NS 24/29), facilitating the introduction of drying agents or the application of a vacuum. This design ensures a vacuum-tight seal, making it ideal for storing moisture-sensitive substances and drying moist products in both vacuum and non-vacuum applications.