Description
DURAN® plastic stopper NS 24/29 is a white polyethylene laboratory stopper featuring an octagonal top for secure handling of ground joint glassware. Produced from low-density polyethylene (LDPE), this stopper includes a blue insert and fully conforms to the DIN 12254 standard for dimensional compatibility. It is intended for the reliable sealing and storage of reagents and chemicals in flasks and other vessels equipped with NS 24/29 joints. The octagonal design facilitates easy insertion and removal while ensuring a tight fit that protects contents during routine laboratory procedures. Supplied as a single unit, the stopper has a net weight of 0,007 kg, making it lightweight yet robust for daily use. This product from manufacturer Duran/DWK Life Sciences supports efficient chemical handling workflows thanks to the polyethylene construction and precise joint sizing. Laboratories benefit from its practical construction for organising and preserving various reagents without compromising on standard compliance or ease of operation in experimental settings.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
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Questions about DURAN® Plastic Stopper, Polyethylene, white, octagonal
What is this article?
DURAN® Plastic Stopper, Polyethylene, white, octagonal is the article on this page. Luminix Health distributes DWK Life Sciences 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?
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.

