Description
Silicone rubber stopper, top Ø 12 mm, bottom Ø 8 mm, height 20 mm is a tapered laboratory sealing plug for glassware and vessels. Made from silicone, it combines an upper outer diameter of 12 mm with a lower outer diameter of 8 mm and an overall height of 20 mm, delivering a secure, flexible fit in matching openings. The material offers elasticity and resilience suited to routine chemical, biological and analytical work, including temporary closure of flasks, bottles and tubes during sample handling or storage. Supplied in packs of 10 pieces from manufacturer Brand, each stopper is lightweight (net weight 0,0175 kg, gross weight 0,01 kg) and originates from Germany. Packaging measures 0,035 m depth by 0,045 m width by 0,02 m height with a volume of 0,00003 m³. The tapered silicone profile allows easy insertion and removal while maintaining an effective barrier against evaporation or contamination in everyday laboratory procedures. These stoppers integrate readily into standard lab workflows wherever a soft, reusable silicone seal is required.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 10 pc(s)
- Material: Silicone
- Top diameter: 12 mm
- Bottom diameter: 8 mm
- Height: 20 mm
- EAN: 4033378279613
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Questions about Stopper, silicone rubber, h. 20 mm, upper dia. 12 mm, lower dia. 8 mm
What is this article?
Stopper, silicone rubber, h. 20 mm, upper dia. 12 mm, lower dia. 8 mm is the article on this page. Luminix Health distributes Brand 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.