Description
Rubber stopper with top diameter 49,5 mm, bottom diameter 40 mm and height 40,5 mm is a tapered laboratory plug for closing larger flask and bottle necks in routine lab practice. Produced from red natural rubber, it delivers a flexible, resilient seal that seats firmly in round openings and supports reliable containment of liquids and solids during storage, handling or short-term holding. The conical profile—49,5 mm at the top tapering to 40 mm at the base—matches common wide-neck glassware used in chemical, preparative, teaching and general laboratory settings. Supplied as a pack of 10 pieces with a net weight of 0,910 kg, the format is practical for bench stock and shared preparation areas. These stoppers from manufacturer Labbox are intended for everyday sealing applications where a robust natural-rubber fit is required. The solid construction allows repeated insertion and withdrawal while preserving a dependable closure that helps reduce evaporation and contamination risk. Specified dimensions of 49,5 mm / 40 mm and 40,5 mm height enable clear size selection alongside related stopper variants.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 10 pc(s)
- Material: red natural rubber
- Top diameter: 49,5 mm
- Bottom diameter: 40 mm
- Height: 40,5 mm
- EAN: 8434868045477
- GTIN: 08434868045477
- Technical Information Sheet:
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Questions about Rubber stopper, solid, Øtop. 49,5 mm, Øbottom 40 mm, h 40,5 mm, 10 pcs
What is this article?
Rubber stopper, solid, Øtop. 49,5 mm, Øbottom 40 mm, h 40,5 mm, 10 pcs is the article on this page. Luminix Health distributes Labbox 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. Delivery across Europe, two to five days when in stock. 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.
