Description
Transparent VMQ silicone stopper with a lower diameter of 18 mm and an upper diameter of 24 mm is a solid laboratory sealing plug for glassware and vessels. At 30 mm height and with zero bore holes, this tapered stopper delivers a continuous sealing surface for flasks, bottles and tubes in analytical, research and teaching environments. The VMQ silicone material provides the elasticity together with thermal and chemical resistance typical of silicone rubber stoppers used in laboratories. Transparency of the plug allows visual inspection of the sealed opening. Net weight is 0,01123 kg per unit. This stopper from manufacturer Deutsch & Neumann comes as a single piece and is intended for routine laboratory sealing where an inert, reusable silicone plug of these dimensions is specified. Applications include chemistry, biology and general lab workflows that require reliable temporary or extended closure of vessel necks without through-bores for tubing or probes.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
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Questions about stopper VMQ, transparent, bottom diameter: 18 mm top diameter: 24 mm height: 30
What is this article?
stopper VMQ, transparent, bottom diameter: 18 mm top diameter: 24 mm height: 30 is the article on this page. Luminix Health distributes Deutsch & Neumann 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?
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.

