Hollow Glass Stopper
Hollow glass stoppers provide secure and reliable sealing for standard ground glass joints across a wide range of laboratory glassware and distillation assemblies. Constructed from durable borosilicate glass with precision ground fits, these stoppers are available in seven joint sizes — 10/30, 14/20, 19/22, 24/40, 29/26, 34/45, and 45/50 — ensuring compatibility with the most common laboratory glass connections. The hollow design reduces weight while maintaining a consistent and airtight seal. Suitable for use in distillation systems, research assemblies, and general laboratory glassware requiring dependable joint closure. Use the selector above to choose the joint size that matches your glassware specification.
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