Labbox Red PE Test Tube Stopper for Ø13 mm test tubes
The Ø13mm red polyethylene test tube stopper from Astiks is a flange type stopper that seals 13mm plastic test tubes whilst adding clear visual identification. This red polyethylene test tube stopper supports colour coding of mid-volume tubes in teaching, QC and research laboratories.
Made from polyethylene, the stopper offers good resistance to many common laboratory chemicals and is suitable for repeated daily use. The flanged head improves grip for gloved hands and helps ensure a consistent seating depth. Red colour coding is often used to mark controls, hazardous contents or priority samples, and pairs well with neutral and blue stoppers in the same range. These stoppers fit Astiks TUPP and TUPS 13mm plastic test tubes. Fit with other 13mm diameter test tubes must be tested before use.
Practical Applications
– Highlighting 13mm tubes containing controls, standards or flagged samples
– Colour coding by user, project or hazard category
– Sealing tubes for bench work, incubation or short-term storage
– Organising QC and stability samples in racks and trays
– Supporting teaching exercises where colour coded tubes aid identification
Key Features
– Ø13mm flange type red polyethylene test tube stopper
– Push-fit closure suitable for repeated use with 13mm tubes
– Flanged top for secure handling and positive location at the tube mouth
-Compatible with Astiks 13mm plastic test tubes TUPP and TUPS
– Durable and reusable for everyday laboratory workflows
Quality & Standards
– Polyethylene material chosen for toughness and resistance to many lab reagents
– Designed for repeated use in education, research and QC environments
– Smooth finish for easy cleaning and reduced risk of tube damage
– Intended for non-pressurised use with 13mm plastic test tubes
Specifications
– Tube compatibility: Ø13mm plastic test tubes
– Material: Polyethylene (PE)
– Colour: Red
– Design: Flange type push-fit stopper
– Brand: Labbox Astiks
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