Description
Oval magnetic stirring bar 20 x 40 mm is an ellipsoid laboratory stir bar for round-bottom flasks, combining a 20 mm outer diameter with a 40 mm length for larger vessel volumes and more vigorous mixing. The bar is encapsulated in polytetrafluoroethylene (PTFE), offering chemical resistance and a smooth surface that limits sample carry-over and simplifies rinsing between experiments. Pack size is 10 pc(s), suitable for equipping several stirrers or maintaining spare stock in synthesis and analytical laboratories. Net weight is 0,026 kg. The ellipsoid profile matches the curvature of round-bottom glassware, supporting stable rotation under magnetic drive and helping keep solutions, suspensions and reaction mixtures in continuous motion. These PTFE magnetic stirring bars from manufacturer Witeg are intended for use with standard magnetic stirrers and hotplate stirrers wherever an oval form factor is specified for flask work. Material, dimensions and pack configuration follow the manufacturer description, providing a clear, application-focused option for routine laboratory agitation without invented purity, sterility or performance statements.
This article is part of Magnetic stirring bars, in Stirring, shaking & mixing.
Key features
- Pack size: 10 pc(s)
- Shape: Ellipsoid (oval)
- Material: Polytetrafluoroethylene (PTFE)
- Outer diameter: 20 mm
- Length: 40 mm
- Technical Information Sheet:
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Questions about Magnetic stirring bar oval 20 x 40 mm
What is this article?
Magnetic stirring bar oval 20 x 40 mm is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Magnetic stirring bars, inside Stirring, shaking & mixing, in Lab instruments.
A magnetic stirring bar is the magnet coated in PTFE that spins inside a vessel, driven by a stirrer underneath. Length and shape, plain, oval or cross, have to suit the flask. A bar left against a dry glass wall will grind it.
Stirring keeps a mixture uniform or helps a solid dissolve. A magnetic stirrer spins a bar inside a closed vessel. An overhead stirrer drives a shaft when the liquid is viscous or the volume is large. A vortex mixer agitates a tube. A shaker moves a whole rack or a plate. The shape of the impeller and the speed decide whether the liquid turns over or merely spins. The vessels being stirred are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stirring, shaking & mixing. The sub-category is Magnetic stirring bars. The catalogue is Lab instruments.
Shelves beside this one are Stirring shafts, propellers & impellers, Magnetic stirrers, Stirring & mixing accessories, Homogenisers & dispersers, Shakers, rockers & rotators, Overhead stirrers and Vortex mixers.
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.