BRAND® magnetic stirring bar, PTFE, octagonal with pivot ring L 25 mm, bar diam. 8 mm | Sigma-Aldrich
Fisherbrand Cylindrical Spinbar Magnetic Stirring Bar Stir Bar; PTFE, Cylindrical, | Fisher Scientific
LUERFLEX Cylindral Magnetic Stirring Bars 10mm Pack of 10: Amazon.com: Industrial & Scientific
Magnetic stirring bars, with pivot ring, cylindrical | VWR
HYCC Magnetic Stirrer Hot Plate Max 716°F, 100-2000RPM Hot Plate with Magnetic Stirrer, 2000mL Magnetic Hotplate Stirrer, Magnetic Stirrer w/Magnetic Stir Bar: Amazon.com: Industrial & Scientific