Description
Rotilabo®-PTFE stopper NS 34/35 is a PTFE laboratory stopper matched to standard taper joints of size NS 34/35. It is intended for sealing flasks, reactors and other glassware that use this common ground-joint format in chemical, analytical and preparative work. The PTFE construction offers a chemically resistant, low-adhesion surface that helps maintain a clean seal interface and simplifies cleaning between uses. As part of the stoppers-with-standard-taper category, the component supports reliable closure of laboratory vessels during storage, sampling or intermediate process stages. Each unit is supplied singly and weighs 0,095 kg, making it a practical spare or replacement item for labware kits. The Rotilabo® stopper from manufacturer ROTH SELECTION is shaped for the NS 34/35 geometry so that it seats correctly in compatible joints when glassware is properly prepared. Laboratories use such PTFE stoppers wherever metal-free, solvent-tolerant closures are preferred over cork or rubber alternatives. The single-piece pack size suits controlled stock management in research, teaching and quality-control environments.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Product type: PTFE stopper with standard taper
- Joint size: NS 34/35
- Material: PTFE
- Brand: Rotilabo®
- Weight: 0,095 kg
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Questions about Rotilabo®-PTFE stopper, NS 34/35, 1 unit(s)
What is this article?
Rotilabo®-PTFE stopper, NS 34/35, 1 unit(s) is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Ground-joint glass stoppers, inside Stoppers, caps & closures, in Labware.
A ground-glass stopper matches a ground neck of a stated joint size. A 14/23 stopper does not seal a 29/32 neck. The stopper is part of the flask's seal, and a chip on the grind is a leak.
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 Ground-joint glass stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone stoppers, Lids & seals and Closures (other).
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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.