Excellent fit and heating for spherical flasks.

• Fully covers flask
• Pliable interior fabric
• Zipper closure prevents heat loss

This mantle covers both the top and bottom of the spherical flask and helps to prevent vapor condensation in the upper half of a flask during distillation of high boiling materials. With a glass fabric construction and laced up side opening the elliptical hole accomodaters 1, 2 and 3 neck flasks.