Pyrex® Pear Shape Boiling Flasks with 19/22 [ST] Joint, Corning 4316

PYREX® pear shape boiling flasks have full length 19/22 outer Standard Taper joints and are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest lab conditions. The normal working temperature for PYREX® boiling flasks is 230°C.

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