Product Overview
Four Larger Magnetic Stirring Bars, 30 to 70 mm, PTFE Covered with a Center Pivot Ring
Condition
Unused and clean. Each set holds one each of the 30, 45, 60 and 70 mm bars, and the pictured bars are representative of the stock. Every bar has a white PTFE covering, an octagonal body and a raised ring at its center.
Selling online since 1999. It ships from our Idaho warehouse the same or next business day.
Product Overview
Larger magnetic stir bars move the volume in big beakers, flasks and starter vessels that a small bar only swirls at the bottom. Four lengths in one set let you match the bar to the vessel instead of making one size do every job.
Key Features
- Lengths 30 mm (1.18 in), 45 mm (1.77 in), 60 mm (2.36 in) and 70 mm (2.75 in)
- Length by diameter: 30 x 8 mm, 45 x 9 mm, 60 x 10 mm and 70 x 10 mm
- White PTFE covering
- Octagonal body with a raised pivot ring at the middle
- Pivot ring suited to concave-bottom vessels
- One bar of each length per set
Applications
- Stirring a yeast starter in a large flask on a homebrew stir plate
- Mixing buffer and media batches in large beakers in a teaching or research lab
- Matching bar length to vessel size across a bench of stir plates
Frequently Asked Questions
Are the bars PTFE covered?
Yes. Each bar has a white PTFE covering over its magnet.
Is a stir plate or bar retriever included?
Not included.
Do these bars suit a flask with a concave bottom?
Yes. The raised pivot ring gives each bar a stable spin in a concave bottom. On a convex bottom a pivot-ring bar can struggle to keep contact and spin. Flat-rate shipping in the lower 48, and orders over the free-shipping line ship free.
The ring around each bar's waist is small, but it decides how well the bar behaves in a concave bottom. Check the bottom of your flask, then pick the length.
