Description
Biogen sterile stoppers for neck inner diameter 11,5–13,5 mm are cellulose laboratory stoppers that combine air permeability with bacteria-filtering performance. Produced from Zellstoff, they support gas exchange while helping to limit microbial ingress during incubation and handling of culture media. The stoppers are sterilizable and suitable for preparation by common laboratory sterilization methods prior to placement on bottles, flasks or tubes. Supplied in packs of 1000 pieces, they provide an economical bulk format for high-throughput microbiology and routine media work. Designed for necks with an internal diameter between 11,5 and 13,5 mm, this Biogen variant from manufacturer Witeg ensures a reliable breathable fit on glassware in that size band. Soft cellulose construction conforms gently to the vessel rim, offering an alternative to airtight rubber or silicone plugs whenever controlled aeration is needed. Net weight of the pack is 1,369 kg. These stoppers sit alongside cork, rubber, silicone and standard laboratory stoppers as a dedicated cellulose choice for breathable, bacteria-filtering closure of vessels within the stated neck range.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1000 pc(s)
- Product type: Biogen sterile stoppers
- Neck inner diameter: 11,5–13,5 mm
- Material: Cellulose (Zellstoff)
- Air permeability: Air-permeable
- Filtration: Bacteria-filtering
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Questions about Steristoppers for neck I-Ø 11,5 - 13,5 mm
What is this article?
Steristoppers for neck I-Ø 11,5 - 13,5 mm is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Rubber & silicone stoppers, inside Stoppers, caps & closures, in Labware.
A rubber or silicone stopper is pushed into a mouth. The size number corresponds to a top and bottom diameter. Silicone survives higher temperatures and more autoclave cycles. Natural rubber is attacked by oils and by some solvents.
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 Rubber & silicone stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Ground-joint glass 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.