Beschreibung
GUKO rubber seal 46 mm is a conical rubber gasket intended for laboratory sealing tasks, particularly around filtration glassware. It features an upper diameter of 53 mm, a lower diameter of 33 mm and a height of 34 mm, giving a tapered profile that seats firmly between matching funnel and flask components. The unit is supplied as 1 pc(s) and has a net weight of 0,022 kg. These dimensional values support consistent mounting on apparatus of corresponding size and help maintain a stable seal during vacuum or gravity filtration. In practice the seal is used as a nutsche or Büchner funnel gasket and as a general rubber sleeve for glass joints. The flexible rubber construction accommodates repeated assembly while retaining shape. Offered from manufacturer Witeg within the GUKO range, the part suits routine analytical and preparative workflows where a reliable conical rubber interface is required. Its compact mass and clearly defined diameters make size selection straightforward for standard laboratory glassware sets.
This article belongs on Cutting & sealing tools, in Tools & accessories.
Key features
- Pack size: 1 pc(s)
- Product type: Conical rubber seal
- Upper diameter: 53 mm
- Lower diameter: 33 mm
- Height: 34 mm
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Questions about Guko, rubber gasket, conical, O.D. top:
What is this article?
Guko, rubber gasket, conical, O.D. top: is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Cutting & sealing tools, inside Tools & accessories, in Laborbedarf.
Cutting and sealing tools score glass tubing, trim a stopper, or close a bag and a film. A glass cut that is only scored, not pulled, shatters instead of breaking clean.
The small tools of the bench are what the hand actually holds: a spatula for a powder, forceps for an object that must stay clean, a brush for a narrow neck, a desiccator when a dried sample must not take up water again. None of these reads a measurement. They keep the measurement possible. The apparatus around them is listed under ISO laboratory apparatus.
Which category should I open next?
The category is Tools & accessories. The sub-category is Cutting & sealing tools. The catalogue is Laborbedarf.
Shelves beside this one are Spatulas & spoons, Other lab tools & accessories, Lab furniture, trolleys & storage, Tweezers & forceps, Scissors, scalpels & dissecting instruments, Weighing boats, dishes & paper, Desiccators & desiccant, Grease, boiling stones & sealants, Timers, stopwatches & calculators, Stationery, books & lab notebooks, Brushes & cleaning tools, Stirring rods, spreaders & glass tools and Gas handling & burners accessories.
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.

