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Two Clicks. A More Deliberate Culture-Tube Closure.
Choose the closure position your culture workflow needs. MTC Bio DuoClick™ tubes use a patented two-position screw cap: the first click for aerobic culturing, and past the second click for a manufacturer-described leakproof, airtight closure for anaerobic culturing.
Build your case around 5 mL or 14 mL capacity, polypropylene or polystyrene, and the packaging your bench uses. Sterile 500-tube cases include attached caps and printed graduations; non-sterile PP bulk cases are a distinctly different 1,000-tube option with separate caps and no graduations.
5 & 14 mL
Two tube capacities
PP or PS
Choose tube material
2 Positions
HDPE screw-cap closure
12 Choices
Case configurations
Designed for Controlled Handling
Audible and Tactile Click
A distinct click helps identify the closure position as the cap is rotated.
Flat, Markable Cap
A flat cap surface provides a convenient marking area.
Sterile Packaging Choices
Bagged and foam-racked configurations in PP or PS; individually wrapped sterile configurations in PP.
Clearly Different Bulk Option
T8750 and T8850 are non-sterile PP with separate caps and no graduations—not the sterile graduated configuration.
A Screw Closure, Not a Snap Cap
The two-position HDPE cap is designed for rotational handling rather than a traditional snap-on closure. Select the first-click or fully closed position to match your validated culture procedure.
Important: HDPE caps are not autoclavable. Tube-body temperature ratings must not be applied to the complete capped assembly.
Choose Your Material and Case
Polypropylene (PP)
Sizes: 5 mL and 14 mL
Tube-body maximum RCF: 4,000 × g
Tube-body temperature range: −86°C to 121°C
Packaging: Sterile bags, foam racks or individual wraps; non-sterile bulk
Polystyrene (PS)
Sizes: 5 mL and 14 mL
Tube-body maximum RCF: 1,400 × g
Tube-body temperature range: 0°C to 70°C
Packaging: Sterile bags or foam racks
The Bulk Difference
Catalogs: T8750 / T8850
Case size: 1,000 PP tubes with separate caps
Sterility: Non-sterile
Graduations: None
Match the Packaging to Your Bench
Choose 20 bags of 25 for grouped handling, 10 foam racks of 50 for organized access, or individually wrapped PP tubes when individual packaging is preferred. Each sterile configuration is 500 tubes per case.
Family photographs illustrate selected graduated and racked configurations. Packaging and graduation status depend on your selected catalog number; bulk models are not graduated.
See the DuoClick Closure in Action
Manufacturer video from MTC Bio. Use the current configuration guide above for sterility, material and case-count differences.
Typical Laboratory Applications
- Aerobic culture workflows using the first-click cap position
- Validated anaerobic culture workflows using the fully closed position
- Routine culture handling in 5 mL or 14 mL tube formats
- Organized bench workflows with sterile foam-rack packaging
Before You Add a Case
Check volume, material, sterility and packaging together. One cart unit is one complete case. Confirm rotor support, chemical compatibility and working conditions; do not infer strainer-cap functionality or universal instrument fit from tube dimensions.
Frequently Asked Questions
How do the two DuoClick cap positions work?
Rotate the screw cap to the first click for the aerobic position. Rotate it past the second click for the manufacturer-described leakproof, airtight closure for anaerobic culturing. A cap setting alone does not establish or validate an anaerobic culture system; follow your organism-specific protocol.
Are DuoClick culture tubes available in 12 × 75 and 17 × 100 mm sizes?
Yes. The 5 mL DuoClick culture tubes are 12 × 75 mm, and the 14 mL tubes are 17 × 100 mm. Select the required polypropylene or polystyrene material, sterility and pack configuration by catalog number. Verify working volume, rack and rotor compatibility rather than relying on nominal capacity alone.
How do polypropylene culture tubes differ from polystyrene DuoClick tubes?
MTC Bio rates polypropylene (PP) tube bodies up to 4,000 × g and from −86°C to 121°C, and polystyrene (PS) tube bodies up to 1,400 × g and from 0°C to 70°C. These are tube-body limits, not ratings for the complete capped assembly. Both use HDPE caps, which are not autoclavable. Validate chemical compatibility and centrifuge support for your application.
Are all versions sterile and graduated?
No. The ten 500-tube case configurations are sterile, have attached screw caps and printed graduations. T8750 (5 mL PP) and T8850 (14 mL PP) are non-sterile, non-graduated bulk cases with tubes and caps packed separately. The current manufacturer page identifies e-beam sterilization for sterile offerings.
What does one unit ordered contain?
One unit is one complete case. Sterile models contain 500 tubes: 20 bags of 25, 10 foam racks of 50, or individually wrapped tubes according to the selected catalog number. T8750 and T8850 each contain 1,000 tubes with caps supplied separately in bulk. Prices and inventory quantities refer to cases, not individual tubes.
Can I autoclave DuoClick tubes with the caps attached?
No. MTC Bio explicitly states that the HDPE DuoClick caps are not autoclavable. Do not interpret the PP tube-body temperature limit of 121°C as permission to autoclave the capped assembly. Confirm any tube-only sterilization procedure with the manufacturer and your validated laboratory protocol.
Is DuoClick an alternative to Corning Falcon 352059?
DuoClick T8830 is an option to evaluate for workflows using Falcon 352059: both are sterile 14 mL, 17 × 100 mm PP tubes with printed graduations, supplied 25 per pack and 500 per case. DuoClick uses an HDPE two-position screw cap, while Falcon 352059 uses a polyethylene dual-position snap cap. MTC Bio rates its PP tubes to 4,000 × g; Corning rates 352059 to 3,000 × g and additionally specifies RNase/DNase-free status and nonpyrogenicity testing below 0.1 EU/mL. Those additional claims are not established here for DuoClick. These are different products, not proven identical, OEM equivalents or guaranteed drop-in replacements. Validate fit and assay performance before switching.
Are these the same as strainer-cap flow cytometry tubes?
No. DuoClick uses a two-position screw closure and does not include a cell-strainer mesh. If your protocol calls for a strainer cap or specific flow cytometer fit, select a tube intended for that purpose and validate compatibility. Do not substitute based only on a 12 × 75 mm tube dimension.
Falcon is a trademark of its respective owner. Blue Tiger Scientific is not affiliated with Corning.
Related products and workflow options
- Related workflow: sterile inoculating loops and needles — For inoculation steps in culture workflows; choose loop volume and geometry for your protocol.
- Related workflow: sterile serological pipettes — For measured media handling during culture preparation; select a suitable pipette controller separately.
- Alternative format: snap-cap culture tubes — Same 12 × 75 and 17 × 100 mm sizes with two-position snap caps, including uncapped bulk tubes and separate caps.
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