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Boiling Flasks, used for boiling operations, these flasks are made of heat resistant borosilicate glass and may be exposed to flame. The flasks are not graduated but do have a white enamel spot for labeling. The flasks also make unique decorative storage containers and may be fitted with rubber stoppers. See the chart for stopper sizes.

Metric Equivalents:
28ml = 1 fluid ounce
25mm = 1 inch
Metric Conversion Calculator

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NEW!
Designed for laboratory use, this is a variable heat control, ceramic top heater. The heat is generated from resistant coils recessed into the ceramic top. It also comes with a removable ceramic top plate especially designed for round bottom flasks.  Features:

• Effective temperatures are from ambient to 600° F
• Hot plate measures 6 x 6"
• The open area in the removable ceramic top plate measures 3.75" diameter
• 500 Watts
• For round bottom glassware up to 1000ml

From our in-house testing, we have found this versatile hot plate to be a good low-price alternative for those who do not wish to invest in a $250 Heating Mantle.  Using the round-bottom ceramic adaptor, we brought 500ml of water to a boil in 14 minutes for a simple distillation procedure.   A 5" support ring was able to securely support this compact and efficient heater.

Please note:  This heater is designed for quick and rapid heating.  The variable temperatrue adjustment is limited.  If you need finely adjustable temperature settings we recommend our digital magnetic stirrers.