Description
Dual-position caps for sample tubes with Ø 17 mm are polyethylene closures designed for controlled culture work in the laboratory. Colourless in appearance, each cap can be set to two positions after insertion into the tube: a loose position that supports handling of aerobic cultures and a sealed position for anaerobic culture work. This dual-mode fit lets users switch between gas exchange and a closed environment without exchanging the closure, which is useful in microbiology, sample preparation and routine tube-based assays. The geometry is matched to tubes with a 17 mm diameter, aligning with common sample-tube and test-tube formats used at the bench. Supplied in a practical pack of 500 pieces from manufacturer Labbox, the caps suit laboratories that need a reliable bulk stock of dual-position polyethylene closures. Net weight is specified as 1,000 kg for the pack unit. Clear colourless material aids visual checks of tube contents while the two seating options support both open aerobic steps and sealed anaerobic handling in everyday workflows.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 500 pc(s)
- Material: Polyethylene
- Colour: Colourless
- Tube diameter: 17 mm
- Function: Dual-position (loose / sealed)
- EAN: 8434868107144
- Technical Information Sheet:
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Questions about Screw cap for test tubes, for Ø 17 mm tubes
What is this article?
Screw cap for test tubes, for Ø 17 mm tubes is the article on this page. Luminix Health distributes Labbox 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. Delivery across Europe, two to five days when in stock. 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.