Test Tube Plug Caps, Polyethylene, Blue — 12 mm & 16 mm, 1000/Bag | Globe Scientific

Blue Polyethylene Plug Caps for 12 mm and 16 mm Test Tubes, 1000/Bag

These Globe Scientific Plug Caps deliver a secure snap-fit seal for standard 12 mm and 16 mm round-bottom and culture tubes. Color-coded in blue for fast rack identification, they suit sample storage, specimen transport, and routine clinical and microbiology workflows where reliable, reusable closures keep contents contained and organized.

Technical Specifications

Available Sizes

Applications

• Sealing 12 mm and 16 mm culture and test tubes during sample storage
• Specimen transport where a secure push-in closure is required
• Color-coded rack organization by tube size or sample type
• Microbiology workflows using round-bottom tubes
• Routine clinical and serology bench protocols
• Short-term refrigerated sample retention

Quality & Procurement

Supplied by labsupplies.com, an authorized Globe Scientific dealer shipping from US inventory. Each bag carries a lot number to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available on bulk orders across both sizes.

Frequently Asked Questions

What tube sizes do these plug caps fit?

Two diameters are offered: SKU 118139B fits 12 mm tubes and SKU 116142B fits 16 mm tubes. Match the cap to the outer tube diameter for a proper snap-fit seal.

What material are the caps made from?

Both sizes are molded from polyethylene, providing flexible push-in retention and broad compatibility with aqueous samples and standard refrigerated storage.

Are these caps sterile?

No. The caps ship non-sterile in bags of 1000. For aseptic protocols, autoclave or sterilize per your lab's validated procedure before use.

How are the caps packaged and sold?

Each SKU is sold per bag of 1000 caps. Pricing shown is per bag, and lot numbers on each bag support documentation for accredited workflows.