Description
Rubber stopper with top diameter 37,5 mm, bottom diameter 28,5 mm and height 44 mm is a tapered laboratory closure for sealing glassware and process vessels. Produced from red natural rubber, it combines elasticity with surface friction to achieve a dependable fit in flasks, bottles and other laboratory containers. The pronounced conical geometry, stepping from 37,5 mm at the upper face down to 28,5 mm at the base across a 44 mm height, accommodates a useful span of neck diameters typical in chemical, analytical and teaching laboratories. Delivered in packs of 10 pieces, the stoppers are suited to routine vessel closure, sample holding and general laboratory handling. The natural-rubber material supplies the resilience expected for repeated insertion and withdrawal under normal bench conditions. Offered by manufacturer Labbox, this larger format complements the standard rubber-stopper range used wherever a simple mechanical seal is required. Net weight of the pack is 0,567 kg. Well-defined dimensions enable quick selection against common glassware openings, positioning the product as a practical everyday item for sealing, temporary storage and everyday experimental work.
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: 37,5 mm
- Bottom diameter: 28,5 mm
- Height: 44 mm
- EAN: 8434868045453
- GTIN: 08434868045453
- Technical Information Sheet:
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Questions about Rubber stopper, solid, Øtop. 37,5 mm, Øbottom 28,5 mm, h 44 mm, 10 pcs
What is this article?
Rubber stopper, solid, Øtop. 37,5 mm, Øbottom 28,5 mm, h 44 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. 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.