Magnetic Stir Rods (5-Piece) 1.2" Smooth PTFE Mixing Bars
Magnetic Stir Rods (5-Piece) 1.2" Smooth PTFE Mixing Bars is backordered and will ship as soon as it is back in stock.
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Description
Description
These PTFE magnetic stir bars come five to a pack, each 30mm x 8mm (about 1.2" x 0.3"), with a smooth, rounded shape that spins freely on the bottom of a liquid culture jar instead of catching on it.
Drop one into every LC jar before you sterilize it, then spin the culture on a stir plate or with an external magnet. The PTFE coating is non-stick and non-reactive, and it is rated from -196°C to 250°C, well above pressure-cooker temperatures.
- 5 barsPer pack
- 30mmLength (1.2")
- 8mmDiameter
- PTFECoating
- 250°CMax temp
Why growers pick these stir bars
- One for every jar – Five bars means each LC jar gets its own, sterilized right in the jar with the broth.
- Won't stick in the jar – The smooth, rounded capsule shape spins freely on the bottom of liquid culture jars.
- Handles sterilization – Rated from -196°C to 250°C, so pressure cooking at 121°C is no problem.
- Non-reactive PTFE – The coating won't react with nutrient broth, and it resists corrosion and abrasion.
- Steady spin – Clean, burr-free bars hold a stable RPM on a stir plate.
What's included
- Five PTFE-coated magnetic stir bars, 30mm x 8mm, white
How to use them for liquid culture
- Add the bar first. Drop one stir bar into each jar before you add the liquid culture broth.
- Sterilize together. Pressure-sterilize the jar with the stir bar and broth inside, then let it cool fully.
- Inoculate. Add spores or culture to the cooled jar with sterile technique.
- Spin it. Set the jar on a magnetic stir plate and raise the speed slowly until the bar locks on, or swirl it with an external magnet.
- Reuse. After the jar is used up, wash the bar and keep it for your next batch.
Tip: Stir bars couple best through a thin, flat jar bottom. If the bar keeps spinning out, lower the speed and bring it back up gradually.
Specifications
| Specification | Detail |
|---|---|
| Quantity | 5 stir bars |
| Size | 30mm x 8mm (1.18" x 0.31") |
| Shape | Smooth, rounded capsule |
| Material | PTFE coating over a magnetic core |
| Color | White |
| Temperature rating | -196°C to 250°C |
| Works with | Magnetic stir plates and external magnets |
| Uses | Liquid culture jars, lab solutions |
Pair it withSpin your cultures hands-free with the Magnetic Stir Plate, or start with a complete Premium Liquid Culture Kit.
FAQ
What size are the stir bars?
Each bar is 30mm long and 8mm in diameter, about 1.2" x 0.3".
Can I sterilize them in the jar?
Yes. They are rated from -196°C to 250°C, so they go into the pressure cooker inside the jar with your liquid culture broth.
Do I need a stir plate?
No. A stir plate spins the culture hands-free, but you can also move the bar with an external magnet whenever you check on the jar.
Why a smooth capsule shape?
The smooth, rounded shape spins freely on the bottom of liquid culture jars instead of catching or sticking.
Are they reusable?
Yes. Wash them after each batch and sterilize them in the next jar.
Why won't my stir bar spin?
Use a thin, flat-bottomed jar, center it on the plate, and raise the speed slowly so the bar can lock onto the magnet.
