Description
DURAN® polyethylene stopper NS 45/40 is a precision laboratory closure manufactured from low-density polyethylene (LDPE) for volumetric flasks, mixing cylinders and standing bottles. The ergonomic form simplifies opening and closing of ground-joint glassware while improving handling safety. A multi-grooved cone provides optimal sealing performance and helps prevent solvent evaporation. Distinctive colour-coded inserts allow quick visual assignment of the NS size and follow the same colour convention as Keck™ clamps, supporting efficient organisation in the laboratory. A batch clock indicates the production year and month, and the underside carries the material designation “PE04”. Supplied without bottle, this stopper from manufacturer Duran/DWK Life Sciences is intended for the preparation and storage of standard solutions, colour-coded identification and secure sealing of NS 45/40 joints. Robust LDPE construction delivers chemical resistance suitable for a wide range of aqueous and organic media encountered in analytical chemistry and routine laboratory practice.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Low-density polyethylene (LDPE)
- Joint size: NS 45/40
- Brand: DURAN®
- EAN: 4032051308510
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Questions about DURAN® Polyethylen-Stopper
What is this article?
DURAN® Polyethylen-Stopper 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.