Flasks

Lead rings fit neatly around the neck of filtering flasks with side-arm tubing connections without disconnecting the tubing.

• Stabilizes vessels in water baths or on the benchtop
• Open ring; flexible enough to be pulled apart to accommodate a wider vessel
...

With a concave recess in the top to support round bottom flasks, retorts, dishes, etc.

These PYREX® flat bottom boiling flasks have full length outer 24/40 TS joints, but with shorter necks. They 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-...

These PYREX® round bottom boiling flasks have long necks with tooled mouths and use rubber stoppers for sealing. They 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...

These PYREX® round bottom boiling flasks have short ring necks and are designed to be used with rubber stoppers. These ring neck boiling flasks are precisely tooled for uniform stopper fit. The reinforced rim increases mechanical strength. These flasks are used in applications requiring rigid stoppering and as wash bottles in routine lab washing. They are manufactured from...

Kimble 25276 KIMAX Round Bottom Boiling Flasks with Short Neck and 14/20 Joint. This flask has a short neck and a medium length Standard Taper joint. Ref: ASTM Method D322. 

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