Description
Silicone stopper 49–41 mm Ø, 40 mm h is a tapered laboratory sealing component manufactured from silicone. The stopper measures 49 mm at the upper diameter and tapers to 41 mm at the lower diameter, with a height of 40 mm that provides firm engagement in corresponding vessel necks. Flexible silicone construction delivers a dependable seal for flasks, bottles and similar laboratory containers encountered in everyday analytical and preparative work. Offered as a single unit, this item from manufacturer Hecht forms part of the standard silicone stopper assortment used for intermediate or temporary closures. The gradual taper facilitates controlled insertion and withdrawal while preserving contact around the opening rim. Such stoppers are selected when laboratories need an elastic, accurately sized plug for sample retention, reagent handling or simple reaction vessels. The 40 mm height contributes sufficient depth for stable seating during mixing, transfer or short holding periods. Consistent 49–41 mm dimensions support reliable fit with common glassware apertures in research and quality-control settings.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Silicone
- Upper diameter: 49 mm
- Lower diameter: 41 mm
- Height: 40 mm
- Design: Tapered stopper
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Questions about Silicone stoppers mm 49 - 41 Ø 40 h
What is this article?
Silicone stoppers mm 49 - 41 Ø 40 h is the article on this page. Luminix Health distributes Hecht for laboratory use. It sits in Rubber & silicone stoppers, inside Stoppers, caps & closures, in Labware.
A rubber or silicone stopper is pushed into a mouth. The size number corresponds to a top and bottom diameter. Silicone survives higher temperatures and more autoclave cycles. Natural rubber is attacked by oils and by some solvents.
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 Rubber & silicone stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Ground-joint glass 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.