https://www.belart.com/bel-art-f37112-0016-disposable-polygon-spinbar-magnetic-alnico-stirring-bars-teflon-coated-41-3-x-8-mm-pack-of-100.html
SP Bel-Art | SP Bel-Art Spinbar Teflon Disposable Polygon Magnetic Stirring Bars; 41.3 x 8mm, White...
SP Bel-Art Spinbar Teflon Disposable Polygon Magnetic Stirring Bars; 41.3 x 8mm, White (Pack of 100), SP Bel-Art Labware Glassware Healthcare