PYREX® 165mm Borosilicate Glass Vacuum Bell Jar with Top Knob and Ground Flange – 6885-165

The PYREX® 165mm Glass Vacuum Bell Jar is a durable laboratory glass enclosure designed for vacuum experiments, scientific demonstrations, and controlled low-pressure applications. Manufactured from PYREX® borosilicate glass using specially selected mould-blown blanks, it features a finely ground bottom flange for sealing against a compatible ground glass vacuum plate. The integrated top knob allows convenient lifting and positioning. Rated for a vacuum pressure differential of one atmosphere, this transparent and reusable bell jar is suitable for physics laboratories, scientific research facilities, educational institutions, and laboratory vacuum testing. Key Features & Specifications - 165mm Outer Diameter: Provides a spacious glass enclosure for laboratory vacuum applications. - 156mm Inner Diameter: Accommodates samples and small experimental components. - 315mm Overall Height: Suitable for benchtop vacuum experiments. - PYREX® Borosilicate Glass: Offers chemical resistance and dimensional stability. - Mould-Blown Construction: Manufactured from specially selected glass blanks. - Precision-Ground Bottom Flange: Supports tight sealing with a compatible ground glass plate. - Integrated Top Knob: Provides a convenient handle for lifting and positioning. - One-Atmosphere Vacuum Rating: Designed to withstand the specified external pressure differential. - Transparent Glass Body: Allows visual observation of enclosed samples and experiments. - Reusable Design: Suitable for repeated laboratory applications when properly inspected and maintained. Specification Details Brand PYREX® Manufacturer Corning Product Number 6885-165 Supplier Reference 401491 Product Type Laboratory Vacuum Bell Jar Jar Style Bell-Shaped Material Borosilicate Glass Glass Code PYREX® 7740 Outer Diameter Approximately 165mm Inner Diameter Approximately 156mm Overall Height Approximately 315mm Top Design Integrated Glass Knob Bottom Design Precision-Ground Glass Flange Vacuum Rating 1 Atmosphere Glass Appearance Clear / Transparent Construction Method Mould-Blown Suitable for Vacuum Applications Yes, within rated limits Suitable for Positive Pressure No Suitable for Heating No Reusable Yes Quantity per Pack 1 Piece Quantity per Case 2 Pieces Applications Vacuum Experiments, Physics Demonstrations, Scientific Research, Laboratory Testing