PYREX® 140mm Borosilicate Glass Vacuum Bell Jar with Top Knob and Ground Flange – 6885-140

The PYREX® 140mm Glass Vacuum Bell Jar is a durable laboratory glass enclosure designed for vacuum experiments, scientific demonstrations, and controlled low-pressure applications. Manufactured from specially selected mould-blown borosilicate glass, it features a precision-ground bottom flange that facilitates an airtight seal with a compatible ground glass vacuum plate. The integrated top knob provides convenient handling and lifting. Rated for one atmosphere of external pressure differential under vacuum, this reusable bell jar is suitable for physics laboratories, research institutions, educational facilities, and scientific testing applications. Key Features & Specifications - 140mm Outer Diameter: Compact bell-shaped enclosure for laboratory vacuum applications. - 130mm Inner Diameter: Provides space for small laboratory samples and experimental components. - 265mm Overall Height: Suitable for benchtop vacuum demonstrations and experiments. - Borosilicate Glass Construction: Provides chemical resistance and dimensional stability. - Precision-Ground Bottom Flange: Designed to form a close seal against a compatible ground glass plate. - Integrated Top Knob: Convenient handle for lifting and positioning. - 1-Atmosphere Vacuum Rating: Suitable for vacuum applications within the manufacturer's specified limit. - Transparent Glass Body: Allows clear observation of enclosed experiments. - Reusable Construction: Suitable for repeated laboratory applications with appropriate inspection and care. - Mould-Blown Glass Design: Manufactured from selected glass blanks for consistent construction. Specification Details Brand PYREX® Manufacturer Corning Product Number 6885-140 Supplier Reference 401491 Product Type Laboratory Vacuum Bell Jar Jar Style Bell-Shaped Material Borosilicate Glass Glass Code PYREX® 7740 Outer Diameter Approximately 140mm Inner Diameter Approximately 130mm Overall Height Approximately 265mm Top Design Integrated Glass Knob Bottom Design Ground Glass Flange Vacuum Rating 1 Atmosphere Transparency Clear Suitable for Vacuum Applications Yes Suitable for Positive Pressure No Suitable for Heating No Reusable Yes Quantity per Pack 1 Piece Quantity per Case 2 Pieces Previous Product Number 6888-140 Applications Vacuum Experiments, Physics Demonstrations, Scientific Research, Laboratory Testing