30 mL Centrifuge Tubes, PP, Natural — 388-6000-UCL | 100/Bag | Caplugs® Evergreen

Tamper-Evident Mailing Kit with 2 × 30 mL Centrifuge Tube Box, Plastic Bag & Mailing Box — Polypropylene, Natural, 100/Bag (388-6000-UCL)

This complete tamper-evident mailing kit is designed for the secure packaging and transport of biological or environmental samples contained in two 30 mL centrifuge tubes. Each kit includes a tamper-evident inner box sized for two 30 mL centrifuge tubes, a plastic bag for secondary containment, and an outer mailing box — providing a three-component, nested packaging solution in a single unit. Supplied non-sterile in bulk (100/Bag), these polypropylene kits are well suited for laboratories that routinely ship or courier samples and need a standardized, tamper-evident chain-of-custody format.

Technical Specifications

Applications

• Chain-of-custody specimen shipping for clinical, environmental, or forensic samples
• Secondary and tertiary containment during courier or postal transport of tube-based samples
• Standardized sample dispatch workflows requiring tamper-evident documentation
• Reference laboratory submissions and inter-facility sample transfers
• High-throughput shipping programs where a complete, pre-matched kit simplifies packaging steps

Material & Chemical Resistance

The polypropylene components offer good resistance to aqueous buffers, dilute acids and bases, and common alcohols encountered in laboratory sample handling and packaging workflows. Polypropylene is autoclavable, making empty components suitable for heat sterilization if required upstream of use. As with all PP labware, prolonged contact with chlorinated or aromatic solvents should be avoided, as these can compromise the material over time.

Quality & Procurement

Made in USA, Caplugs® Evergreen tamper-evident mailing kits are manufactured under ISO 9001 quality management from BPA-free, phthalate-free, latex-free polypropylene resin. LabSupplies.com is an authorized dealer and ships from USA inventory, with tiered pricing available for high-volume institutional, public health, and reference laboratory accounts.

Frequently Asked Questions

Are the centrifuge tubes included in the kit?
No — the kit contains only the tamper-evident inner box, the plastic bag, and the outer mailing box. Centrifuge tubes must be sourced separately and are not part of part number 388-6000-UCL.

Are these kits sterile?
No, they are supplied non-sterile. For applications requiring sterile sample containers, the centrifuge tubes used with this kit should be selected with the appropriate sterility specification independently.

Can the polypropylene components withstand freezing temperatures during shipment?
Polypropylene maintains reasonable toughness at typical cold-chain temperatures used for sample shipping (refrigerated or dry-ice transport); however, impact resistance can decrease at very low temperatures, so appropriate cushioning practices should be followed for frozen shipments.