Description
Tamper-evident closure PP is a blue polypropylene screw cap for wide-neck square laboratory bottles of 250 ml. Equipped with a GL 45 thread, the closure delivers a dependable seal and a clear visual indication of first opening, helping protect sample identity and storage integrity in chemical, pharmaceutical and general laboratory environments. The wide-neck design supports convenient filling, dispensing and cleaning of the matching square bottle format, while polypropylene provides robust everyday chemical resistance for typical lab reagents and media. Offered in a pack of 10 pieces with a net weight of 0,01 kg per closure, the product is convenient for routine restocking of 250 ml bottle lines. This Originalitätsverschluss from manufacturer Witeg is specified for wide-neck square bottles and integrates into standard GL 45 laboratory bottle systems without special tooling. It is well suited to reagent holding, intermediate sample storage and workflows that require both secure closure and straightforward tamper evidence on opening.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
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Questions about Tamper-proof cap PP blue, for square bot
What is this article?
Tamper-proof cap PP blue, for square bot is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Screw caps & closures, inside Stoppers, caps & closures, in Labware.
A screw cap has a thread and a liner. The thread has to match the bottle. The liner has to survive the liquid: a pulp liner fails in a solvent that a PTFE-faced liner ignores. The colour of the cap is not the specification.
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 Screw caps & closures. The catalogue is Labware.
Shelves beside this one are Rubber & silicone stoppers, 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.


