Description
Erlenmeyer flask 250 ml Boro 3.3 with narrow neck and NS 29/32 ground joint is a conical laboratory flask manufactured from borosilicate glass 3.3. White graduated markings facilitate quick visual volume checks during routine preparation and processing steps. The flask has a nominal volume of 0,25 l and a height of 140 mm, and is made according to DIN ISO 4797 for standardised laboratory glassware dimensions. Its narrow neck with NS 29/32 joint supports tight, interchangeable connections to common ground-glass fittings, stoppers, and transfer accessories. Borosilicate glass 3.3 delivers strong resistance to chemicals and thermal stress, making the vessel suitable for mixing, gentle heating, dissolution work, and short-term holding of solutions. Supplied in a pack of 10 pieces from manufacturer Hirschmann, this format is well suited to general analytical and preparative tasks, media handling, and applications that benefit from the stable conical profile for swirling. White graduation remains clearly legible on the glass body. Delivery is available as long as stock lasts.
This article is part of Erlenmeyer flasks, in Beakers & flasks.
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Questions about ERLENMEYER FLASK 250 ML, NARROW NECK WITH NS 29/32
What is this article?
ERLENMEYER FLASK 250 ML, NARROW NECK WITH NS 29/32 is the article on this page. Luminix Health distributes Hirschmann for laboratory use. It sits in Erlenmeyer flasks, inside Beakers & flasks, in Labware.
An Erlenmeyer, or conical, flask has a flat base and a narrowing wall so a liquid can be swirled. It is the ordinary culture and titration flask. A baffled wall is a different article, used when the swirl must turn the liquid over.
A beaker is an open working vessel: easy to pour, poor as a measure. An Erlenmeyer flask has a flat base and a conical wall so a liquid can be swirled without climbing out. A round-bottom flask is for heating under a condenser, because the heat meets a curved wall and the joint at the neck connects to the rest of the glassware. Borosilicate is the glass that survives the temperature change. These forms are listed under ISO laboratory glassware.
Which category should I open next?
The category is Beakers & flasks. The sub-category is Erlenmeyer flasks. The catalogue is Labware.
Shelves beside this one are Round-bottom flasks, Beakers, Reaction vessels & jacketed vessels, Flat-bottom flasks, Flasks (other) and Beaker & flask accessories.
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.

