Description
Glass-stoppers, semi-hollow, DURAN® provide a practical sealing solution for laboratory vessels equipped with larger standard ground joints. Each stopper combines a semi-hollow glass body with an octagonal head and a standard ground joint of 29/32, matching common flask and bottle necks used in synthesis, distillation and sample storage. DURAN® glass construction delivers the clarity, thermal behaviour and chemical durability associated with professional laboratory glassware. The semi-hollow design reduces mass relative to fully solid stoppers of similar joint size while retaining a stable seal at the ground interface. An octagonal grip surface aids controlled insertion and removal during assembly changes or cleaning. Offered as a pack of 10 pieces weighing 0,716 kg in total, the product supports efficient restocking of shared glassware inventories. These stoppers from manufacturer Lenz are intended for standard taper joints of size 29/32 and fit directly into compatible DURAN® and other ground-joint systems. They are classified among laboratory stoppers with standard taper and serve routine sealing tasks in research, quality control and teaching laboratories where a semi-hollow DURAN® stopper at NS 29/32 is specified.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 10 pc(s)
- Product type: Semi-hollow glass-stoppers
- Material: DURAN® glass
- Head shape: Octagonal
- Joint size: Standard ground joint 29/32
- Weight: 0,716 kg
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Questions about Glass-stoppers, semi-hollow, DURAN®, octagonal, standard ground joint 29/32
What is this article?
Glass-stoppers, semi-hollow, DURAN®, octagonal, standard ground joint 29/32 is the article on this page. Luminix Health distributes Lenz for laboratory use. It sits in Ground-joint glass stoppers, inside Stoppers, caps & closures, in Labware.
A ground-glass stopper matches a ground neck of a stated joint size. A 14/23 stopper does not seal a 29/32 neck. The stopper is part of the flask's seal, and a chip on the grind is a leak.
A closure is the part that decides whether a bottle stays shut and whether the contents attack the seal. A ground-glass stopper matches a ground neck. A screw cap needs the right thread and a liner that survives the liquid. Rubber and silicone stoppers push into a mouth. The liner, not the colour of the cap, is the chemical choice. The vessels they close are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stoppers, caps & closures. The sub-category is Ground-joint glass stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone stoppers, Lids & seals and Closures (other).
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.