PYREX® 222mm Borosilicate Glass Vacuum Bell Jar with Top Knob and Ground Flange – 6885-222

The PYREX® 222mm Glass Vacuum Bell Jar is a high-quality laboratory glass enclosure designed for vacuum experiments, scientific demonstrations, and controlled low-pressure applications. Manufactured from specially selected mould-blown glass, it features a precision-ground bottom flange designed to provide a tight seal with compatible ground glass vacuum plates. The integrated glass 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, research institutions, educational facilities, and scientific testing applications. Key Features & Specifications - 222mm Outer Diameter: Large glass enclosure suitable for laboratory vacuum applications. - 213mm Inner Diameter: Provides internal space for scientific experiments and laboratory samples. - 425mm Overall Height: Tall bell-shaped design for laboratory vacuum testing. - PYREX® Glass Construction: Durable laboratory glass with good chemical resistance. - Mould-Blown Construction: Manufactured from specially selected glass blanks. - Precision-Ground Bottom Flange: Designed for tight sealing against compatible ground glass plates. - Integrated Top Knob: Provides a convenient handle for lifting and positioning. - One-Atmosphere Vacuum Rating: Suitable for vacuum experiments within the manufacturer's specified limits. - Transparent Glass Body: Allows observation of experiments without removing the enclosure. - Reusable Design: Suitable for repeated laboratory applications with proper care. - Manufacturer Packaging: 2 pieces per pack and 2 pieces per case. Specification Details Brand PYREX® Manufacturer Corning Product Number 6885-222 Supplier Reference 401491 Product Type Laboratory Vacuum Bell Jar Jar Style Bell-Shaped Material PYREX® Laboratory Glass Glass Appearance Clear / Transparent Outer Diameter Approximately 222mm Inner Diameter Approximately 213mm Overall Height Approximately 425mm Top Design Integrated Glass Knob Bottom Design Precision-Ground Glass Flange Construction Method Mould-Blown Glass Vacuum Rating 1 Atmosphere Vacuum Compatible Yes, within rated limits Positive Pressure Compatible No Suitable for Heating No Reusable Yes Quantity per Pack 2 Pieces Quantity per Case 2 Pieces Previous Product Number 6888-222 Applications Laboratory Vacuum Experiments, Physics Demonstrations, Scientific Research, Low-Pressure Testing