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Your cart is empty.Dewar vacuum flasks are made of double-walled borosilicate glass, fully silvered, evacuated to 10-5 and covered by a protective mesh. Evacuation tips and flask bottoms are fully coated and enclosed in an aluminum base. Polyethylene lids are included with all flasks. These vacuum lab-grade standard dewars are manufactured for efficient use with liquid nitrogen (LN2) and other liquid gases.
Holly PBW
Reviewed in the United States on February 25, 2020
My husband, the science teacher, got these for his classroom. They are perfect. He is very pleased with the low cost and high durability of these.
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