Stocked in Ontario for Fast Shipping Across Canada
Cambridge Environmental stocks magnetic stir bars in Canada to help laboratories get the supplies they need without unnecessary import delays. Available inventory ships from our Ontario location, with delivery across Canada. Stock availability varies by size and quantity.
Our octagonal PTFE-coated magnetic stir bars are designed for routine laboratory mixing, stirring and sample preparation. Each stir bar features a strong ALNICO V magnetic core enclosed in a low-friction PTFE coating for use with compatible chemicals and laboratory vessels.
Available in 14 sizes, from 13 mm to 75 mm long, these autoclavable stir bars are suitable for Canadian research laboratories, food and beverage testing, environmental laboratories, universities and industrial QA/QC facilities.
Environmental water testing, food and beverage QA/QC, microbiology, university teaching laboratories, chemical research, solution preparation, analytical testing and routine laboratory mixing.
Choose your stir bar number from the product options above. Cambridge offers 14 octagonal PTFE-coated sizes for different laboratory mixing requirements.
| Stir Bar Number | Diameter | Length |
|---|---|---|
| 00 | 3 mm | 13 mm |
| 01 | 8 mm | 13 mm |
| 02 | 8 mm | 22 mm |
| 03 | 8 mm | 25 mm |
| 04 | 10 mm | 38 mm |
| 06 | 8 mm | 51 mm |
| 07 | 10 mm | 51 mm |
| 08 | 8 mm | 64 mm |
| 10 | 8 mm | 28 mm |
| 11 | 8 mm | 38 mm |
| 12 | 8 mm | 41 mm |
| 15 | 10 mm | 25 mm |
| 19 | 8 mm | 15 mm |
| 20 | 13 mm | 75 mm |
Dimensions are listed as diameter × length and follow Cambridge's existing product specifications. Check the selected size before ordering.
13–25 mm lengths: Consider for smaller vessels and routine sample preparation where clearance permits.
28–41 mm lengths: General laboratory mixing in appropriately sized beakers and flasks.
51–75 mm lengths: Larger vessels and applications where additional stirring coverage is needed.
The correct size depends on the vessel's internal diameter, bottom shape, sample volume, viscosity and stirrer strength. Start with a moderate stirring speed and increase as required for stable mixing.
The PTFE coating provides a smooth, low-friction surface and chemical resistance to many laboratory reagents. Check compatibility with the specific chemicals and temperatures used in your procedure.
Inspect stir bars regularly for scratches, damaged coatings or exposed magnetic material. Replace damaged stir bars to help avoid sample contamination.
These stir bars are autoclavable. Follow your laboratory's validated cleaning and sterilization procedures.
To help maintain magnetic performance, avoid dropping stir bars onto hard surfaces or storing large quantities together in a random pile. Store them in an organized arrangement, with magnetic poles appropriately aligned.
Cambridge Environmental stocks magnetic stir bars in Ontario to support fast domestic shipping. Availability can vary by size and order quantity. Contact us if you need to confirm stock for an urgent order.
Available inventory is supplied from our Ontario location for prompt shipping to Canadian laboratories. Delivery depends on the selected size, quantity, destination and carrier service. Contact us if you have a specific deadline.
Yes, for suitable magnetic stirrers and hotplate stirrers. Confirm that the bar dimensions, temperature and material compatibility meet the requirements of your equipment and application.
The flat-sided octagonal profile can provide effective mixing and turbulence in compatible vessels. Stirring performance also depends on the vessel, liquid properties and magnetic drive.
Yes. Cambridge lists these PTFE-coated octagonal stir bars as autoclavable. Follow your laboratory's validated sterilization and handling procedures.
PTFE is resistant to many common laboratory chemicals, but suitability depends on the chemical, concentration, temperature and exposure conditions. Confirm compatibility before use.
Yes. Cambridge can assist with recurring laboratory requirements, departmental orders and larger quantities. Contact us with the stir bar numbers and quantities needed to confirm pricing and available inventory.
Cambridge also carries micro stir bars, colour-coded octagonal stir bars and other laboratory stirring accessories. Our team can help you compare sizes and select a suitable option.
Cambridge Environmental is a Canadian-owned laboratory supplier based in Komoka, Ontario. We stock magnetic stir bars locally to help Canadian laboratories receive routine supplies quickly.
Need a particular size, multiple quantities or an urgent delivery? Contact our team to confirm available stock, Canadian pricing and shipping options.
Contact Cambridge for Stock & Delivery
