PYREX® 222 mm Diameter Bell Jar with Top Knob and Ground Flange
Corning Life Sciences(This is the suggested replacement for 6888-222These 222mm diameter PYREX® bell jars are made from specially selected mold-blown blanks. The bottom flange has a finely ground finish to assure tight sealing with ground glass plates. The knob on top provides a convenient handle for lifting the jars. They are rated at 1-atmosphere of vacuum. -Warning: do not use with heat or pressure applications."