Description
Silicone stopper with top diameter 44,5 mm, bottom diameter 37,3 mm and height 25,4 mm is a tapered laboratory closure for sealing flasks, bottles and other open necks in everyday lab work. Made from brown silicone, it combines elasticity with a firm seating profile so that the larger upper diameter and narrower lower diameter ease insertion while helping retain a reliable seal. The elastomer remains usable from −70 °C to 200 °C, covering chilled storage through moderately heated apparatus without becoming brittle or excessively soft. A pack of 10 pieces from manufacturer Labbox keeps common sizes on hand for chemistry benches, sample preparation and teaching laboratories. Net weight is 0,078 kg per pack. These reusable plastic stoppers suit routine sealing tasks where cork or harder rubber is less convenient, and they integrate readily with standard glassware workflows. Dimensions are stated with European decimal commas for clear ordering against neck openings. Choose this size when the vessel mouth matches the 44,5 mm / 37,3 mm taper for consistent fit and handling.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 10 pc(s)
- Material: Silicone, brown
- Top diameter: 44,5 mm
- Bottom diameter: 37,3 mm
- Height: 25,4 mm
- EAN: 8434868045606
- GTIN: 08434868045606
- Technical Information Sheet:
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Questions about Silicone stopper, solid, Øtop 44,5mm, Øbottom 37,3 mm, h 25,4 mm, 10 pcs
What is this article?
Silicone stopper, solid, Øtop 44,5mm, Øbottom 37,3 mm, h 25,4 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.