14 rubber stopper
The normal working temperature for PYREX reg boiling flasks is 230 deg C.
The reinforced rim increases mechanical strength
Their excellent chemical durability results in contamination-free results and long life under the toughest lab conditions
These flasks are used in applications requiring rigid stoppering and as wash bottles in routine lab washing. nbsp Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance
These ring neck boiling flasks are precisely tooled for uniform stopper fit