Standard cryobox dividers are designed around 1.5–2.0 mL tube diameters, leaving labs that work with 0.2 mL PCR tubes or 0.5 mL microtubes without a properly fitted freezer storage option. The Heathrow Scientific Cardboard Cryogenic Freezer Boxes for small tubes solve this gap with purpose-built well grids sized specifically for sub-milliliter tubes. The 0.2 mL version packs 144 wells (12 × 12) into a standard cryobox footprint, while the 0.5 mL version provides 81 wells (9 × 9) — both with integrated dividers and coated cardboard construction rated for −80 °C storage. Sold in packs of 10, these boxes bring the same disposable economy of standard cardboard cryoboxes to the small-tube segment that plastic manufacturers often overlook.
Features and Benefits
Purpose-Built for Small Tubes: Well diameters of 9.5 mm (0.2 mL) and 12 mm (0.5 mL) grip smaller tubes securely — no rattling, tilting, or falling through oversized wells.
High Density: The 0.2 mL version fits 144 tubes in a standard cryobox footprint — 44% more capacity than a 100-well box — making it the densest small-tube storage option available in cardboard.
Integrated Dividers: Pre-assembled cell dividers are included, eliminating the need to purchase and assemble inserts separately.
Coated Cardboard, −80 °C Rated: Moisture-resistant coating protects the box through standard freezer storage cycles without premature breakdown.
Standard Cryobox Footprint: 5.2 × 5.2-inch base fits all upright and chest freezer racks designed for 2-inch cryoboxes.
Specifications
| Property | Value |
|---|---|
| SKU | 120220 (0.2 mL) / 120221 (0.5 mL) |
| Brand | Heathrow Scientific |
| Material | Coated Cardboard |
| 0.2 mL Version | 144-place (12 × 12), well ⌀ 9.5 mm, H: 1.1 in (2.9 cm) |
| 0.5 mL Version | 81-place (9 × 9), well ⌀ 12 mm, H: 1.6 in (4.1 cm) |
| Base Footprint | 5.2 × 5.2 in (13.3 × 13.3 cm) |
| Temperature Rating | −80 °C |
| Pack Size | 10 per pack |
| Color | White |
| Country of Origin | China |
Laboratory Applications
Archival freezer storage of 0.2 mL PCR tubes and strip tubes from completed qPCR, RT-PCR, and genotyping experiments
Organized cold storage of 0.5 mL aliquot tubes used in enzyme stocks, primer working solutions, and small-volume reagent libraries
Clinical genomics and molecular diagnostics labs that generate large numbers of small-volume extracts requiring long-term freezer archiving
Frequently Asked Questions
Do these boxes include dividers?
Yes. Unlike the standard cardboard cryobox-and-lid sets, these small-tube boxes ship with integrated pre-assembled dividers sized to the specific tube diameter.
Will 0.2 mL PCR strip tubes fit?
Individual 0.2 mL tubes fit the 9.5 mm wells. Connected 8-tube PCR strips will not fit — they must be cut into individual tubes first.
Can I use these in a liquid-nitrogen freezer?
No. Cardboard construction is rated for −80 °C mechanical freezers only. For liquid-nitrogen storage of small tubes, use polycarbonate or polypropylene cryoboxes.
Quality Assurance
Heathrow Scientific cardboard cryogenic products are manufactured with moisture-resistant coatings and pre-assembled dividers. Each lot is inspected for divider alignment, well-diameter accuracy, and lid fit before release.
Ordering
Authorized dealer, ships from USA inventory. Serving academic, government, and research laboratories nationwide.
