Description
Ventilation screw caps GL 56 provide vented closure for laboratory bottles and vessels that use a GL 56 screw thread. Each white DURAN® cap is fitted with an ePTFE membrane to support gas exchange and pressure equalisation while limiting particulate or microbial ingress into the vessel. The design is appropriate for culture media, process intermediates and other laboratory liquids that benefit from a controlled headspace rather than a fully airtight seal. Supplied in packs of 4 pc(s) with a pack weight of approximately 0,080 kg, the caps are practical consumables for busy glassware stations. These ventilation screw caps from manufacturer DWK Life Sciences combine the DURAN® brand standard with a functional membrane for research, analytical and teaching laboratories. White colouring aids quick identification among mixed closure stocks, and the GL 56 thread aligns with larger laboratory bottles and container systems where dependable ventilated sealing is required during storage, transport within the lab or temperature-related volume changes.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 4 pc(s)
- Product type: Ventilation screw caps
- Thread size: GL 56
- Membrane: ePTFE
- Colour: White
- Brand: DURAN®
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Questions about Ventilation screw caps GL 56, DURAN® with ePTFE membrane, white, 4 unit(s)
What is this article?
Ventilation screw caps GL 56, DURAN® with ePTFE membrane, white, 4 unit(s) is the article on this page. Luminix Health distributes DWK Life Sciences for laboratory use. It sits in Screw caps & closures, inside Stoppers, caps & closures, in Labware.
A screw cap has a thread and a liner. The thread has to match the bottle. The liner has to survive the liquid: a pulp liner fails in a solvent that a PTFE-faced liner ignores. The colour of the cap is not the specification.
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 Screw caps & closures. The catalogue is Labware.
Shelves beside this one are Rubber & silicone stoppers, Ground-joint glass 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.