Black Rubber Stoppers, Solid, Size #000 - #12

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About this item Airtight Sealing: ensures secure, leak-proof seals for flasks, test tubes, and condensers during experiments or sample storage Wide Size Compatibility: available in multiple sizes (#000 to #12) to fit standard laboratory glassware confirm dimensions before purchase (± 1 mm tolerance) Flexible Material: maintains elasticity and sealing integrity over time without hardening, cracking, or deforming Laboratory-Only Use: designed exclusively for laboratory use not suitable for food or consumable applications Reliable Coverage: 1-year replacement policy for defective or damaged stoppers available in packs of 5 or 10 per size Show more