These PYREX® Round Bottom Boiling Flasks have a short ring neck.
These PYREX® Round Bottom Boiling Flasks have a short ring neck . The precisely tooled opening with reinforced ring improves strength and is ideal for rigid stoppering. These PYREX® round bottom flasks are carefully constructed of No. 7740 borosilicate glass and demonstrate strength without compromising thermal expansion. The estimated upper working temperature of these boiling flasks under normal use is 230°C (446°F).
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