The vacuum rated bell jar is made of molded, thick walled, annealed flint glass. Thick walls are needed to handle the pressure differential between atmospheric pressure and fine vacuum inside the bell jar. Leia Mais »
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Vacuum Bell Jar (3F271), 0.7 gal, Molded, Thick Walled, Annealed Flint Glass
The vacuum rated bell jar is made of molded, thick walled, annealed flint glass. Thick walls are needed to handle the pressure differential between atmospheric pressure and fine vacuum inside the bell jar. Leia Mais »