Test Tube Plug Caps, White Polyethylene Push-In — 12 mm & 16 mm, 1000/Bag | Globe Scientific

White Polyethylene Push-In Plug Caps for 12 mm and 16 mm Test Tubes, 1000/Bag

These Globe Scientific Plug Caps deliver a secure, push-in closure for standard 12 mm and 16 mm test tubes and culture tubes. Molded from flexible white polyethylene, each cap seats firmly to limit evaporation and spillage during sample storage, specimen transport, and routine tube handling on the bench.

Technical Specifications

Available Sizes

Applications

• Sealing culture tubes during incubation and short-term storage
• Capping serum and aliquot tubes for refrigerated sample holding
• Securing tubes during specimen collection and transport
• Reducing evaporation in dilution and reagent prep workflows
• Closing tubes in clinical and microbiology bench setups
• General-purpose replacement closures for 12 mm and 16 mm glass or plastic tubes

Quality & Procurement

labsupplies.com is an authorized Globe Scientific dealer shipping from US inventory. Bags carry lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact our team for volume quotes on multi-bag orders.

Frequently Asked Questions

Which tube diameters do these plug caps fit?

SKU 116142 fits 16 mm tubes and SKU 118139W fits 12 mm tubes. Match the cap size to your tube's outer diameter for a snug push-in seal.

What material are the caps made from?

Both sizes are molded from white polyethylene, a flexible plastic that compresses slightly on insertion to grip the tube rim.

Are these caps sterile?

No. These plug caps are supplied non-sterile and are intended for general laboratory storage, transport, and bench use.

How are the caps packaged and sold?

Each SKU ships as a bag of 1000 caps, and the listed price is per 1000-count bag. Tiered pricing applies to larger institutional orders.