Description
Cone with extension DURAN (Form G) NS 45/40 is a precision laboratory ground joint cone intended for reliable connections in scientific glassware assemblies. Manufactured from borosilicate glass 3.3, it features the standardised NS 45/40 joint size together with an integrated extension tube of 40 mm diameter and 2,3 mm wall thickness. Overall length is 150 mm, giving sufficient reach for modular apparatus construction while maintaining dimensional accuracy for vacuum-tight seals. The component weighs 0,086 kg net and is supplied as a single piece suitable for distillation trains, reaction vessels, extraction systems and other custom laboratory setups. Produced by Rettberg, this Form G DURAN cone offers the chemical durability and thermal-shock resistance characteristic of borosilicate 3.3 glass, ensuring long service life under typical laboratory temperature cycles and solvent exposure. Its geometry supports interchangeability with matching sockets, simplifying assembly and disassembly of complex glass systems used in analytical, preparative and process chemistry environments where standardised ground joints remain essential.
This article belongs on Distillation heads, adapters & columns, in Distillation & extraction glassware.
Key features
- Pack size: 1 pc(s)
- Product type: Ground joint cone with extension
- Joint size: NS 45/40
- Material: Borosilicate glass 3.3
- Tube diameter: 40 mm
- Wall thickness: 2,3 mm
- Technical Information Sheet:
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Questions about Cone/ext./DURAN (shape G) size 45/40
What is this article?
Cone/ext./DURAN (shape G) size 45/40 is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in Distillation heads, adapters & columns, inside Distillation & extraction glassware, in Matériel de laboratoire.
A still head, an adapter or a column is the glass between the boiling flask and the condenser. A Vigreux or packed column gives the vapour a surface so a closer-boiling mixture can separate. The joint sizes at both ends have to match the flask and the condenser.
Distillation separates liquids by boiling point. A condenser turns the vapour back into liquid: Liebig, coil and cold-finger shapes differ in how much cooling surface they offer. A still head and a column sit between the flask and the condenser. A Soxhlet extractor washes a solid again and again with the same solvent. Ground joints have a standard size, and the joint, not the flask, is what has to match. The pieces are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Distillation & extraction glassware. The sub-category is Distillation heads, adapters & columns. The catalogue is Matériel de laboratoire.
Shelves beside this one are Condensers, Ground-joint glassware (other) and Soxhlet & extraction apparatus.
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.
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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.