Description
Red rubber stopper with top diameter 12 mm, bottom diameter 8 mm and height 20 mm is a solid natural-rubber laboratory stopper intended for reliable closure of glassware and vessels. The tapered profile allows secure seating in openings of corresponding size while the resilient natural-rubber material provides a tight seal. Colour is red for easy visual identification among other laboratory consumables. Each unit measures 12 mm at the upper outer diameter, tapering to 8 mm at the lower outer diameter, with an overall height of 20 mm. The stoppers are supplied in a pack of 25 pieces, making them convenient for routine laboratory use and stock replenishment. Manufactured by Brand, these natural-rubber stoppers belong to the standard range of rubber closures used in analytical, preparative and general laboratory work. Gross weight of the pack is approximately 0,04 kg and net weight 0,0475 kg. The plain, unperforated design suits applications where a simple, reusable seal is required without additional fittings or inserts.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 25 pc(s)
- Material: Natural rubber
- Colour: Red
- Top diameter: 12 mm
- Bottom diameter: 8 mm
- EAN: 4033378279910
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Questions about Stopper, red rubber, h. 20 mm, upper dia. 12 mm, lower dia. 8 mm
What is this article?
Stopper, red 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.