One cap, two jobs. The polyethylene cap on these tubes seats in two positions: up and loose so aerobic cultures can breathe, or pushed down for an airtight, liquid-tight seal for anaerobic cultures and storage.
Pick your tube size in the first menu, then material and packing in the second. Choose clear polystyrene or tough polypropylene, sterile with caps attached, individually wrapped, or uncapped in bulk with caps sold separately.
5 & 14 mL
12 × 75 and 17 × 100 mm
2-Position
Aerobic or sealed
Up to 4,000 × g
Polypropylene
Sterile
RNase/DNase-free
Two-Position Caps
Loose for aerobic growth, pressed down for an airtight, liquid-tight seal.
Crystal-Clear Polystyrene
PS tubes give the best clarity for checking growth by eye.
Tough Polypropylene
PP tubes handle −190 °C to +120 °C and spin up to 4,000 × g.
Certified Clean
Sterile tubes are RNase, DNase, pyrogen, and cytotoxin free.
Your Choice of Packing
Bags of 25 or 125, individually wrapped, or uncapped in bulk.
Standard Sizes
Fit standard racks, shakers, and centrifuge adapters for 12 × 75 and 17 × 100 mm tubes.
Choose the size, then the material, then how you want them packed.
5 mL · 12 × 75 mm
Use: Small cultures, serology, and sample aliquots
Packs: Sterile in bags of 25 or 125, or uncapped bulk
Caps: T8309 for uncapped tubes
14 mL · 17 × 100 mm
Use: Overnight bacterial cultures and minipreps
Packs: Sterile in bags of 25, individually wrapped, or uncapped bulk
Caps: T8239 for uncapped tubes
Polystyrene (PS)
Clarity: Crystal clear
Range: 0 °C to 70 °C
Max RCF: 2,000 × g
Polypropylene (PP)
Clarity: Translucent
Range: −190 °C to +120 °C
Max RCF: 4,000 × g
The 17 × 100 mm tube is the standard for overnight bacterial cultures and miniprep starters. Set the cap in the up position so the culture gets air while shaking, then press it down for spinning or storage.
Choose polypropylene if you will centrifuge at up to 4,000 × g or need chemical resistance, or polystyrene for the clearest view of turbidity. Individually wrapped sterile tubes are available for single-tube use.
Need tubes without caps, or caps on their own? The uncapped tubes come non-sterile in bags of 125, and matching low-density polyethylene caps are sold separately for each size.
This suits labs that autoclave their own tubes and media, or that prefer to cap only the tubes they use. For a screw closure that will not pop off, see our DuoClick™ screw-cap culture tubes.
Seat the cap in the first, loose position for shaking aerobic cultures so air can exchange, and press it all the way down for anaerobic work or before centrifuging. For 12 × 75 mm tubes used in flow cytometry, see our FlowTubes™; for larger volumes, see our conical centrifuge tubes.
Yes, for most applications. They are 12 × 75 mm (5 mL) and 17 × 100 mm (14 mL) tubes in polystyrene or polypropylene with two-position caps, sterile or non-sterile. Falcon® and Fisherbrand™ are trademarks of their respective owners; Blue Tiger Scientific is not affiliated.
In the first, loose position the cap lets air exchange for aerobic cultures. Pressed fully down, it forms an airtight, liquid-tight seal for anaerobic cultures, centrifuging, or storage.
Polystyrene is crystal clear and rated 0 °C to 70 °C and 2,000 × g. Polypropylene is translucent, rated −190 °C to +120 °C and up to 4,000 × g, and more chemically resistant.
No. Uncapped tubes (T8302, T8306, T8232, T8236) are non-sterile, bulk packed in bags of 125. Caps are sold separately.
Polypropylene is rated to +120 °C. Polystyrene is rated only to 70 °C and should not be autoclaved.
Most tubes ship 1,000 per case. The individually wrapped 14 mL tubes ship 500 per case.
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