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With fused edges. Manufactured from Duran borosilicate glass type 3.3 for maximum chemical and thermal shock resistance. Duran is a registered trademark of Schott AG. [See More]
Molded-in ribs allow vapors to escape during boiling to eliminate pressure buildup. Meets EPA requirements for methods 3005, 3010, 3020. [See More]
Heavy-wall, borosilicate glass with fire-polished edge provides durability. May be slightly out-of-round due to O.D. variability. [See More]