Laboratory Stir Bars
Magnetic stir bars are designed for efficient mixing of liquids when used with magnetic stirrers.
Coated for chemical resistance, they ensure smooth and consistent agitation.
Australian laboratories depend on reliable stir bars for precise and uniform solution mixing.
Flexible Magnetic Stir Bar Retriever, 40 cm Length, Spin Bar Removal
• Flexible magnetic stir bar retriever for removing spin bars from beakers, flasks and sample containers
• 40 cm length provides reach into deeper vessels, reduces the need to pour liquids to recover bars
• Magnetic tip captures PTFE coated stir bars through glass walls and narrow neck openings in typical labware
• Flexible shaft bends to follow vessel shape, helpful for round bottom flasks and curved container profiles
• For laboratory or educational settings only, use under supervision and rinse between samples to avoid cross contamination
$24.90 (Ex GST)
PTFE Cross Stir Bar 38 x 38 mm, Stable General Purpose Stirring
• PTFE cross stir bar for magnetic stirring, 38 x 38 mm size, general purpose laboratory mixing applications
• Cross profile designed for extra stability on vessel bases, helps reduce jumping and loss of coupling
• Suitable for routine stirring tasks where standard cylindrical bars may chatter at higher speeds or in turbulence
• PTFE construction supports chemical resistance and simple cleaning between different solutions or reagents
• Use in laboratory or educational settings only, match stirrer size to vessel diameter and stirrer motor strength for best control
$13.90 (Ex GST)
PTFE Octahedral Stir Bar 5.5 x 42 mm, Turbulence at Low Speed
• PTFE octahedral magnetic stir bar, size 5.5 x 42 mm, designed for general laboratory stirring
• Profile described as similar to pivot ring type, but promotes more turbulence at low stirring speed
• Useful where mixing is needed at lower RPM, supports agitation without requiring high speed operation
• PTFE construction supports chemical resistance and easy cleaning between different solutions or reagents
• For laboratory or educational settings only, use under supervision and match bar length to vessel size and stirrer strength
$13.90 (Ex GST)
PTFE Oval Stir Bars, For Round Bottom Flasks, L10 to L40 Sizes
• PTFE oval magnetic stir bars designed for round bottom flasks, also known as boiling flasks
• Oval profile suits curved flask bases, supports stable rotation and reduces chatter during stirring
• PTFE construction supports chemical resistance and easy cleaning for routine lab mixing applications
• Size options: L10 6 x 10, L20 8 x 20, L25 10 x 25, L30 11 x 30, L40 15 x 40
• Use in laboratory or educational settings only, choose bar size to match flask volume, viscosity and stirrer coupling strength
From $4.50 (Ex GST)
This product has multiple variants. The options may be chosen on the product page
PTFE Pivot Stir Bars, For Curved Base Vessels, B10 to B40 Sizes
• PTFE pivot type magnetic stir bars designed for vessels with slightly curved or uneven base surfaces
• Pivot action helps bar self align to the optimum stirring position, supports stable rotation and mixing
• Suitable for routine laboratory stirring where standard straight bars may chatter or lose coupling on curved bottoms
• Size options: B10 5 x 10, B20 8 x 20, B25 8 x 25, B30 8 x 30, B40 8 x 40
• Used in laboratory or educational settings only, operate under supervision and match bar size to vessel volume and stirrer strength
From $3.90 (Ex GST)
This product has multiple variants. The options may be chosen on the product page
PTFE Smooth Stir Bars, General Purpose, Z10 to Z50 Sizes
• PTFE smooth stir bars for general purpose magnetic stirring, supports smooth, stable mixing in routine lab work
• Smooth cylindrical profile suits most flat-bottom vessels, reduces chatter and supports consistent coupling to stirrer magnet
• PTFE construction supports chemical resistance and easy cleaning between solutions, reagents and buffers
• Sizes available: Z10 5 x 10, Z15 8 x 15, Z20 7 x 20, Z25 8 x 25, Z30 8 x 30, Z40 8 x 40, Z50 8 x 50
• Choose bar length and diameter to match vessel size, viscosity and stirrer drive strength for best control
From $2.50 (Ex GST)
This product has multiple variants. The options may be chosen on the product page
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Laboratory Stir Bars are magnetic mixing accessories used with magnetic stirrers for routine liquid mixing, solution preparation, reagent blending, and general laboratory agitation. This category includes PTFE smooth stir bars, PTFE oval stir bars, PTFE pivot stir bars, PTFE cross stir bars, PTFE octahedral stir bars, and flexible magnetic stir bar retrievers for easy spin bar removal.
PTFE smooth stir bars are a practical general-purpose option for everyday stirring in beakers, flasks, bottles, and compatible laboratory vessels. Oval stir bars are useful for round bottom flasks, while pivot stir bars are suited to curved base vessels where a standard straight bar may not sit correctly. Cross and octahedral designs help improve mixing movement in specific vessel shapes or lower-speed stirring conditions, depending on the application.
The flexible magnetic stir bar retriever helps remove stir bars from vessels without tipping or manually reaching into the container. This is useful after mixing, especially when working with narrow-neck vessels, deeper glassware, or solutions where cleaner handling is preferred. Users should select stir bars based on vessel shape, liquid volume, viscosity, stirrer strength, speed setting, and chemical compatibility.
PTFE coating is widely used on laboratory stir bars because it provides a smooth, chemically resistant surface for many routine laboratory liquids. Users should still confirm chemical and temperature compatibility before use, especially with aggressive chemicals, high-temperature applications, abrasive suspensions, or specialised solvents. Stir bars should be cleaned after use, inspected for coating damage, and replaced if the surface becomes cracked, worn, or contaminated.
For material reference, ASTM D4894 covers granular PTFE resin specification and test methods, ASTM D543 covers evaluation of plastic resistance to chemical reagents, and ISO 13000-1 provides designation and specification context for processed unfilled PTFE products. These references support the PTFE material and chemical-resistance context only, and should not be used as product-specific compliance claims unless supported by manufacturer documentation.
For LabChoice Australia customers, Laboratory Stir Bars provide a practical accessory range for Australian laboratories, schools, universities, research facilities, and preparation rooms needing reliable magnetic stirring accessories, vessel-specific stir bar shapes, and convenient stir bar retrieval tools for everyday liquid mixing workflows.