This bell jar is made with heavy-duty flint glass. -Thick Top -Ground Base Flange -Flint-Glass Construction It has a thick top to ensure a tight fit. It also has a ground base flange.
This bell jar is made with heavy-duty flint glass. -Thick Top -Ground Base Flange -Flint-Glass Construction It has a thick top to ensure a tight fit. It also has a ground base flange.
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