Description
Solid rubber stopper with an upper diameter of 38 mm, a lower diameter of 31 mm and a length of 35 mm is a tapered laboratory stopper for sealing flasks, bottles and other glassware openings. Made from rubber in a solid, unbored design, it provides a straightforward mechanical closure without a pre-drilled channel for tubing. The conical profile—38 mm at the top tapering to 31 mm at the base over 35 mm length—fits vessel necks in this size range and supports everyday sealing tasks in chemical, analytical and teaching laboratories. Net weight is 0,036 kg. Supplied as 1 piece from manufacturer Witeg, this gum stopper belongs to the standard rubber-stopper range used wherever a simple, reliable plug is required. It is suited to routine vessel closure, temporary storage of samples or reagents, and general lab organisation where a solid rubber seal is preferred over cork or bored alternatives. Dimensions and solid construction make it a practical consumable for consistent neck sealing in daily laboratory workflows.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Rubber
- Design: Solid (unbored)
- Upper diameter: 38 mm
- Lower diameter: 31 mm
- Length: 35 mm
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Questions about Rubber stoppers solid
What is this article?
Rubber stoppers solid 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.