Category Archives: Stir Bars

SIX x Bel-Art Spinpak Stir Bars – assorted sizes

Bel-Art Spinpak Teflon Octagon Magnetic Stirring Bar Assortment (Pack of 6) (F37160-0000)

6 Pack of PTFE Stir Bars by Bel-Art


From the product description, check product page for current description, price and availability:

  • Octagonal shape creates more turbulence and a stronger vortex than a round, cylindrical shape or a polygonal shape
  • Teflon (PTFE) casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning
  • Built-in pivot ring helps reduce vibration and wear during stirring
  • Internal magnet made from alnico V, an alloy of aluminum, nickel, iron, and cobalt
  • Contains six stir bars, two each in the following sizes: 1 x 0.3125″ (25.4 x 8 mm), 1.5 x 0.3125″ (38.1 x 8 mm), 2 x 0.3125″ (50.8 x 8 mm)

Use this in combination with an Erlenmeyer Flask and Stir Plate to make a yeast starter.  A stir plate helps to keep yeast in constant contact with nutrients, encourages CO2 to off gas and continuously incorporates oxygen.  All of that means higher cell counts.

Bel-Art Scienceware F371600000 Teflon (PTFE), Octagonal Spinpak Magnetic Stir Bar Assortment, with Pivot Ring (Pack of 6)


Related: Yeast: The Practical Guide to Beer Fermentation & Best Sellers in Lab Erlenmeyers – via Amazon | StirStarter Stir Plate | Yeast Starters and Fermentation Resource Page

More: Recent Amazon Finds

Great Deal On – StirStarter Stir Plate

7 Stir Bars [various sizes – 10mm to 35mm long] – $12.99, $1.86 Each

7 PTFE Stirs bars ranging from 10mm to 35mm.

Use these in combination with an Erlenmeyer Flask and Stir Plate to make a yeast starter.  A stir plate… keeps yeast in constant contact with nutrients, encourages CO2 to off gas and continuously incorporates oxygen.  All of that means higher cell counts.

9/1/18 9 PM Central: These are selling for $12.99. Shipping to most US addresses is also free with Prime Membership [Try Prime for Free] or a qualifying order. Prices, shipping and availability can change quickly. Please note that product prices and availability are subject to change. Prices and availability were accurate at the time this this post was published; however, they may differ from those you see when you visit Amazon. Check the product page for current price, description and availability. Also: Recent Amazon Finds and Amazon Fillers Resource Page

7pcs PTFE magnetic stirrer mixer stir bar White Color


Related: Yeast: The Practical Guide to Beer Fermentation & Best Sellers in Lab Erlenmeyers – via Amazon | StirStarter Stir Plate | Yeast Starters and Fermentation Resource Page

More: Recent Amazon Finds


Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar – 25.4 x 8mm

Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar; 25.4 x 8mm, White (F37110-0001)

Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar; 25.4 x 8mm, White (F37110-0001)


From the product description, check product page for current description, price and availability:

  • Octagonal shape creates more turbulence and a stronger vortex than a round, cylindrical shape or a polygonal shape
  • Teflon (PTFE) casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning
  • Built-in pivot ring helps reduce vibration and wear during stirring
  • Internal magnet made from alnico V, an alloy of aluminum, nickel, iron, and cobalt
  • Casing material is FDA approved for use in food, drug, and cosmetic applications

Use along with an Erlenmeyer Flask and Stir Plate to do Stir Plate Yeast Starters.

Why a Stir Plate? The constant motion of a stir plate integrates oxygen, puts yeast in constant contact with nutrients, relieves built up CO2 and generally helps yeast to grow more rapidly.  That also means smaller starters.

Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar; 25.4 x 8mm, White (F37110-0001)


Related: Yeast: The Practical Guide to Beer Fermentation & Best Sellers in Lab Erlenmeyers – via Amazon | StirStarter Stir Plate | Yeast Starters and Fermentation Resource Page

More: Recent Amazon Finds

25 mm x 8 mm Stir Bar

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25 mm (about .98″) by 8 mm Teflon Magnetic Stir Bar.

Use this in combination with an Erlenmeyer Flask and Stir Plate to make a yeast starter.  A stir plate… keeps yeast in constant contact with nutrients, encourages CO2 to off gas and continuously incorporates oxygen all of that means higher cell counts.

Bel-Art F37120-0025 Spinbar Teflon Polygon Magnetic Stirring Bar; 25 x 8mm, White, without Pivot Ring


Also Consider: StirStarter Stir Plate | Yeast Starters and Fermentation Resources

More: Recent Amazon Finds


Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar – 25.4 x 9.5 mm

Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar; 25.4 x 9.5mm, White (F37110-0138)

Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar; 25.4 x 9.5mm, White (F37110-0138)


From the product description, check product page for current description, price and availability:

  • Octagonal shape creates more turbulence and a stronger vortex than a round, cylindrical shape or a polygonal shape
  • Teflon (PTFE) casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning
  • Built-in pivot ring helps reduce vibration and wear during stirring
  • Internal magnet made from alnico V, an alloy of aluminum, nickel, iron, and cobalt
  • Casing material is FDA approved for use in food, drug, and cosmetic applications

Use along with an Erlenmeyer Flask and Stir Plate to do Stir Plate Yeast Starters.

Why a Stir Plate? The constant motion of a stir plate integrates oxygen, puts yeast in constant contact with nutrients, relieves built up CO2 and generally helps yeast to grow more rapidly.  That also means smaller starters.

Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar; 25.4 x 9.5mm, White (F37110-0138)


Related: Yeast: The Practical Guide to Beer Fermentation & Best Sellers in Lab Erlenmeyers – via Amazon | StirStarter Stir Plate | Yeast Starters and Fermentation Resource Page

More: Recent Amazon Finds

Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar – 25.4 x 8mm

Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar; 25.4 x 8mm, White (F37110-0001)

Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar; 25.4 x 8mm, White (F37110-0001)


From the product description, check product page for current description, price and availability:

  • Octagonal shape creates more turbulence and a stronger vortex than a round, cylindrical shape or a polygonal shape
  • Teflon (PTFE) casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning
  • Built-in pivot ring helps reduce vibration and wear during stirring
  • Internal magnet made from alnico V, an alloy of aluminum, nickel, iron, and cobalt
  • Casing material is FDA approved for use in food, drug, and cosmetic applications

Use along with an Erlenmeyer Flask and Stir Plate to do Stir Plate Yeast Starters.

Why a Stir Plate? The constant motion of a stir plate integrates oxygen, puts yeast in constant contact with nutrients, relieves built up CO2 and generally helps yeast to grow more rapidly.  That also means smaller starters.

Bel-Art Spinbar Teflon Octagon Magnetic Stirring Bar; 25.4 x 8mm, White (F37110-0001)


Related: Yeast: The Practical Guide to Beer Fermentation & Best Sellers in Lab Erlenmeyers – via Amazon | StirStarter Stir Plate | Yeast Starters and Fermentation Resource Page

More: Recent Amazon Finds

7 Stir Bars [various sizes – 10mm to 35mm long]

7 PTFE Stirs bars ranging from 10mm to 35mm.

Use these in combination with an Erlenmeyer Flask and Stir Plate to make a yeast starter.  A stir plate… keeps yeast in constant contact with nutrients, encourages CO2 to off gas and continuously incorporates oxygen.  All of that means higher cell counts.

7pcs PTFE magnetic stirrer mixer stir bar White Color


Related: Yeast: The Practical Guide to Beer Fermentation & Best Sellers in Lab Erlenmeyers – via Amazon | StirStarter Stir Plate | Yeast Starters and Fermentation Resource Page

More: Recent Amazon Finds


10 Pack of Stir Bars

SEOH Magnetic Stir Bar Plain PTFE 6 x 25mm Pack of 6

10 Pack of Magnetic Stir Bars by SEOH.  PTFE 6 x 25 mm (about an inch).

Use along with an Erlenmeyer Flask and Stir Plate to do Stir Plate Yeast Starters.

Why a Stir Plate? The constant motion of a stir plate integrates oxygen, puts yeast in constant contact with nutrients, relieves built up CO2 and generally helps yeast to grow more rapidly.  That also means smaller starters.

I have this stir bar and it works great.  DIY Stir PlateThe vortex to the right was created with the help of this stir bar.  See: The HBF Stir Plate Mounting-Thingy for more info.

Update: Since this post was published the price, availability or promotion has changed.  Check the product page for current description, price and availability.  Also: Today’s Deals on Amazon

SEOH Magnetic Stir Bar Plain PTFE 6 x 25mm Pack of 10

Also available in single and 6 packs…

AlsoYeast: The Practical Guide to Beer Fermentation · StirStarter Stir Plate · Yeast Starter & Fermentation

More: Recent Amazon Finds

Bel-Art 1.375″ Spinbar Stir Bar

Bel-Art F37110-1388 Spinbar Teflon Octagon Magnetic Stirring Bar; 34.9 x 9.5mm, White

Bel-Art F37110-1388 Stirring Bar. 34.9 mm (about 1.375″)  x 9.5mm.

Use this in combination with an Erlenmeyer Flask and Stir Plate to make a yeast starter.  A stir plate… keeps yeast in constant contact with nutrients, encourages CO2 to off gas and continuously incorporates oxygen.  All of that means higher cell counts.

Update: Since this post was published the price, availability or promotion has changed.  Check the product page for current description, price and availability.  Also: Today’s Deals on Amazon

Bel-Art F37110-1388 Spinbar Teflon Octagon Magnetic Stirring Bar; 34.9 x 9.5mm, White

AlsoYeast Starters & Fermentation Resource Page | StirStarter Stir Plate | Yeast: The Practical Guide to Beer Fermentation

More: Recent Amazon Finds

Great Deal On – StirStarter Stir Plate

25 mm x 8 mm Stir Bar

61ocoocnw-l-_sl1500_

25 mm (about .98″) by 8 mm Teflon Magnetic Stir Bar.

Use this in combination with an Erlenmeyer Flask and Stir Plate to make a yeast starter.  A stir plate… keeps yeast in constant contact with nutrients, encourages CO2 to off gas and continuously incorporates oxygen all of that means higher cell counts.

Bel-Art F37120-0025 Spinbar Teflon Polygon Magnetic Stirring Bar; 25 x 8mm, White, without Pivot Ring


Also Consider: StirStarter Stir Plate | Yeast Starters and Fermentation Resources

More: Recent Amazon Finds