Description
Silicone stopper 27 - 21 mm Ø, 30 mm h is a tapered laboratory stopper manufactured from silicone for secure closure of glassware and vessels. With an upper diameter of 27 mm reducing to a lower diameter of 21 mm and a height of 30 mm, it provides a reliable fit for matching openings. Packaged as 1 pc, this stopper is suited to routine sealing of flasks, bottles and tubes in sample preparation or storage steps. Silicone construction yields the flexibility necessary for repeated use while keeping continuous contact with the vessel rim. Available from manufacturer Hecht, it forms part of the silicone stopper assortment used in laboratories next to cork, rubber and cellulose stoppers. The tapered geometry permits smooth insertion and withdrawal, reducing the risk of glassware stress. Exact dimensions match common labware requiring a 27–21 mm diameter range. The stopper is appropriate for research, analytical and instructional settings that call for a practical silicone seal for intermediate containment of liquids or solids.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Silicone
- Upper diameter: 27 mm
- Lower diameter: 21 mm
- Height: 30 mm
- Shape: Tapered stopper
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Catalogue
Brand
Questions about Silicone stoppers mm 27 - 21 Ø 30 h
What is this article?
Silicone stoppers mm 27 - 21 Ø 30 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.