VWR® Spinbar® Magnetic Stir Bars, Octagon, PTFE-Coated
About this item
Octagonal magnetic stir bars provide consistent, low-friction mixing for routine laboratory applications requiring reliable agitation and suspension.
- PTFE coating provides a durable, inert contact surface for chemical resistance
- Octagon shape improves turbulence for efficient liquid movement
- Alnico magnet offers strong coupling
- Pivot ring reduces friction and chatter
- Autoclavable construction supports reuse in sterile or high-temperature workflows
These stir bars support everyday mixing tasks such as buffer preparation, dissolving reagents, and maintaining suspensions across chemistry and life science workflows.
The PTFE coating provides a durable, inert surface that resists chemical interaction, while the Alnico magnet ensures stable magnetic coupling. The octagonal profile increases surface interaction compared to cylindrical bars, improving mixing efficiency.
Select size based on vessel diameter and fill volume to maintain proper vortex formation. Pivot ring options help reduce friction and improve rotation stability in flat-bottom vessels.
Product Details
Octagonal magnetic stir bars provide consistent, low-friction mixing for routine laboratory applications requiring reliable agitation and suspension.
- PTFE coating provides a durable, inert contact surface for chemical resistance
- Octagon shape improves turbulence for efficient liquid movement
- Alnico magnet offers strong coupling
- Pivot ring reduces friction and chatter
- Autoclavable construction supports reuse in sterile or high-temperature workflows
These stir bars support everyday mixing tasks such as buffer preparation, dissolving reagents, and maintaining suspensions across chemistry and life science workflows.
The PTFE coating provides a durable, inert surface that resists chemical interaction, while the Alnico magnet ensures stable magnetic coupling. The octagonal profile increases surface interaction compared to cylindrical bars, improving mixing efficiency.
Select size based on vessel diameter and fill volume to maintain proper vortex formation. Pivot ring options help reduce friction and improve rotation stability in flat-bottom vessels.
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Search by Lot Number58948-116_P 58948-138_P 58948-171_P 58948-193_P 58948-273_P
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Product Information
- ShapeLengthØCoatingAvailabilityPrice
- Octagon12 mm (½")3 mm (1/8 ")PTFEIn Stock at VWRIn Stock at VWREach$13.69 / EachIn Stock at VWR$13.69Case of 50$684.50 / Case of 50In Stock at VWR$684.50Each$13.69Case of 50$684.50Octagon12 mm (½")3 mm (1/8 ")PTFESpecifications:Product available on GSA Advantage®
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- Octagon12 mm (½")7.9 mm (5/16 ")PTFEIn Stock at VWRIn Stock at VWREach$8.38 / EachIn Stock at VWR$8.38Case of 50$419.00 / Case of 50In Stock at VWR$419.00Each$8.38Case of 50$419.00Octagon12 mm (½")7.9 mm (5/16 ")PTFESpecifications:Product available on GSA Advantage®
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- Octagon16 mm (⁵/₈")7.9 mm (⁵/₁₆")PTFEIn Stock at VWRIn Stock at VWREach$8.00 / EachIn Stock at VWR$8.00Case of 50$400.00 / Case of 50In Stock at VWR$400.00Each$8.00Case of 50$400.00Octagon16 mm (⁵/₈")7.9 mm (⁵/₁₆")PTFESpecifications:
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- Octagon22 mm (⅞")7.9 mm (5/16 ")PTFEIn Stock at VWRIn Stock at VWREach$7.24 / EachIn Stock at VWR$7.24Case of 50$362.00 / Case of 50In Stock at VWR$362.00Each$7.24Case of 50$362.00Octagon22 mm (⅞")7.9 mm (5/16 ")PTFESpecifications:Product available on GSA Advantage®
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- Octagon25 mm (1")7.9 mm (5/16 ")PTFEIn Stock at VWRIn Stock at VWREach$9.32 / EachIn Stock at VWR$9.32Case of 50$466.00 / Case of 50In Stock at VWR$466.00Each$9.32Case of 50$466.00Octagon25 mm (1")7.9 mm (5/16 ")PTFESpecifications:Product available on GSA Advantage®
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- Octagon28 mm (1⅛")7.9 mm (5/16 ")PTFEIn Stock at VWRIn Stock at VWREach$9.17 / EachIn Stock at VWR$9.17Case of 50$458.50 / Case of 50In Stock at VWR$458.50Each$9.17Case of 50$458.50Octagon28 mm (1⅛")7.9 mm (5/16 ")PTFESpecifications:
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- Octagon38.1 mm (1½")7.9 mm (5/16 ")PTFEIn Stock at VWRIn Stock at VWREach$13.38 / EachIn Stock at VWR$13.38Case of 50$669.00 / Case of 50In Stock at VWR$669.00Each$13.38Case of 50$669.00Octagon38.1 mm (1½")7.9 mm (5/16 ")PTFESpecifications:Product available on GSA Advantage®
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- Octagon41 mm (1⅝")7.9 mm (5/16 ")PTFEIn Stock at VWRIn Stock at VWREach$7.55 / EachIn Stock at VWR$7.55Case of 50$377.50 / Case of 50In Stock at VWR$377.50Each$7.55Case of 50$377.50Octagon41 mm (1⅝")7.9 mm (5/16 ")PTFESpecifications:
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- Octagon51 mm (2")7.9 mm (5/16 ")PTFEIn Stock at VWRIn Stock at VWREach$17.33 / EachIn Stock at VWR$17.33Case of 50$866.50 / Case of 50In Stock at VWR$866.50Each$17.33Case of 50$866.50Octagon51 mm (2")7.9 mm (5/16 ")PTFESpecifications:Product available on GSA Advantage®
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- Octagon51 mm (2")7.9 mm (5/16 ")PTFEDirect From SupplierPack of 100$747.99 / Pack of 100Direct From Supplier$747.99Pack of 100$747.99Octagon51 mm (2")7.9 mm (5/16 ")PTFESpecifications:
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- Octagon64 mm (2½")7.9 mm (5/16 ")PTFEIn Stock at VWRIn Stock at VWREach$24.73 / EachIn Stock at VWR$24.73Case of 50$1,236.50 / Case of 50In Stock at VWR$1,236.50Each$24.73Case of 50$1,236.50Octagon64 mm (2½")7.9 mm (5/16 ")PTFESpecifications:
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- Octagon12 mm (½")9.5 mm (3/8 ")PTFEIn Stock at VWRIn Stock at VWREach$11.54 / EachIn Stock at VWR$11.54Case of 50$577.00 / Case of 50In Stock at VWR$577.00Each$11.54Case of 50$577.00Octagon12 mm (½")9.5 mm (3/8 ")PTFESpecifications:
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- Octagon15 mm (⅝”)9.5 mm (3/8 ")PTFEIn Stock at VWRIn Stock at VWREach$10.58 / EachIn Stock at VWR$10.58Case of 50$529.00 / Case of 50In Stock at VWR$529.00Each$10.58Case of 50$529.00Octagon15 mm (⅝”)9.5 mm (3/8 ")PTFESpecifications:
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- Octagon22 mm (⅞")9.5 mm (3/8 ")PTFEIn Stock at VWRIn Stock at VWREach$8.64 / EachIn Stock at VWR$8.64Case of 50$432.00 / Case of 50In Stock at VWR$432.00Each$8.64Case of 50$432.00Octagon22 mm (⅞")9.5 mm (3/8 ")PTFESpecifications:
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- Octagon25 mm (1")9.5 mm (3/8 ")PTFEIn Stock at VWRIn Stock at VWREach$17.77 / EachIn Stock at VWR$17.77Case of 50$888.50 / Case of 50In Stock at VWR$888.50Each$17.77Case of 50$888.50Octagon25 mm (1")9.5 mm (3/8 ")PTFESpecifications:Product available on GSA Advantage®
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- Octagon35 mm (1⅜")9.5 mm (3/8 ")PTFEIn Stock at VWRIn Stock at VWREach$13.88 / EachIn Stock at VWR$13.88Case of 50$694.00 / Case of 50In Stock at VWR$694.00Each$13.88Case of 50$694.00Octagon35 mm (1⅜")9.5 mm (3/8 ")PTFESpecifications:
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- Octagon38.1 mm (1½")9.5 mm (3/8 ")PTFEIn Stock at VWRIn Stock at VWREach$12.34 / EachIn Stock at VWR$12.34Case of 50$617.00 / Case of 50In Stock at VWR$617.00Each$12.34Case of 50$617.00Octagon38.1 mm (1½")9.5 mm (3/8 ")PTFESpecifications:Product available on GSA Advantage®
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- Octagon47.6 mm (1⅞")9.5 mm (3/8 ")PTFEIn Stock at VWRIn Stock at VWREach$18.28 / EachIn Stock at VWR$18.28Case of 50$914.00 / Case of 50In Stock at VWR$914.00Each$18.28Case of 50$914.00Octagon47.6 mm (1⅞")9.5 mm (3/8 ")PTFESpecifications:
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- Octagon51 mm (2")9.5 mm (3/8 ")PTFEIn Stock at VWRIn Stock at VWREach$19.11 / EachIn Stock at VWR$19.11Case of 50$955.50 / Case of 50In Stock at VWR$955.50Each$19.11Case of 50$955.50Octagon51 mm (2")9.5 mm (3/8 ")PTFESpecifications:Product available on GSA Advantage®
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- Octagon64 mm (2½")9.5 mm (3/8 ")PTFEIn Stock at VWRIn Stock at VWREach$27.28 / EachIn Stock at VWR$27.28Case of 50$1,364.00 / Case of 50In Stock at VWR$1,364.00Each$27.28Case of 50$1,364.00Octagon64 mm (2½")9.5 mm (3/8 ")PTFESpecifications:Product available on GSA Advantage®
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- Octagon38.1 mm (1½")12 mm (1/2")PTFEIn Stock at VWRIn Stock at VWREach$36.39 / EachIn Stock at VWR$36.39Case of 50$1,819.50 / Case of 50In Stock at VWR$1,819.50Each$36.39Case of 50$1,819.50Octagon38.1 mm (1½")12 mm (1/2")PTFESpecifications:
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- Octagon76 mm (3")12 mm (1/2")PTFEIn Stock at VWRIn Stock at VWREach$58.27 / EachIn Stock at VWR$58.27Case of 50$2,913.50 / Case of 50In Stock at VWR$2,913.50Each$58.27Case of 50$2,913.50Octagon76 mm (3")12 mm (1/2")PTFESpecifications:Product available on GSA Advantage®
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- OctagonAssortmentPTFEIn Stock at VWRIn Stock at VWRPack of 6$62.89 / Pack of 6In Stock at VWR$62.89Case of 120$1,257.80 / Case of 120In Stock at VWR$1,257.80Pack of 6$62.89Case of 120$1,257.80OctagonAssortmentPTFESpecifications:
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- OctagonAssortmentPTFEIn Stock at VWRIn Stock at VWRPack of 12$203.17 / Pack of 12In Stock at VWR$203.17Case of 72$1,219.02 / Case of 72In Stock at VWR$1,219.02Pack of 12$203.17Case of 72$1,219.02OctagonAssortmentPTFESpecifications:
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