Steristoppers for neck I-Ø 12,5 - 14,5 mm

Biogen sterile stoppers for neck inner diameter 12,5–14,5 mm are air-permeable, bacteria-filtering stoppers manufactured from cellulose (Zellstoff) for laboratory vessels. They permit gas exchange at the opening while helping to retain bacteria, which is useful in microbiology, cell culture support work and sterile media handling. The stoppers are sterilizable and can be processed with standard laboratory sterilization protocols before use. Each unit pack holds 1000 pieces, supporting continuous supply for teaching labs, media kitchens and routine culture workflows. Matched to necks with an internal diameter of 12,5 to 14,5 mm, the Biogen design from manufacturer Witeg gives a soft, conforming seal on compatible flasks, bottles and tubes. Where airtight closure is unnecessary or undesirable, these cellulose stoppers provide a breathable alternative to rubber or silicone plugs. They form part of the wider laboratory stopper assortment that includes cork, rubber, silicone and conventional plugs, and are intended specifically for vessels whose neck openings fall within the stated internal-diameter interval and require combined air permeability and bacteria-filtering behaviour.

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: 12,5–14,5 mm
• Material: Cellulose (Zellstoff)
• Air permeability: Air-permeable
• Filtration: Bacteria-filtering