The Rubber Cork – Size No. 3 in the Laboratory Equipment category is crafted from premium extra-soft rubber to provide a secure, leak-proof seal for various laboratory glassware. Its 19 mm top diameter and 14 mm bottom diameter ensure a snug fit with test tubes, flasks, culture bottles, and sample containers. This design prevents contamination, spillage, and evaporation, making it ideal for chemistry labs, school practicals, research work, and biological experiments. Students and professionals choose this rubber cork for its flexibility, durability, and dependable performance under routine laboratory conditions.
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Type: Extra Soft Rubber Cork
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Size: No. 3
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Top Diameter: 19 mm
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Bottom Diameter: 14 mm
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Flexible, chemical-resistant material
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Provides airtight, leak-proof sealing
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Ideal for chemistry, biology, and general lab use
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Helps prevent contamination and evaporation







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