This magnetic stirring bar fits into the standard 10 mm light path cuvette and provides rapid vertical and horizontal mixing with minimal vortexing.Centrifugal pumping action, generated by cross channels in the upper face, mixes without aerationPhotometric measurements can proceed uninterrupted while reagents are addedOne-piece molded unit will not scratch cuvettes; may also be used in test tubesAlnico magnet encapsulated in FDA Grade, USP Class VI Teflon® brand PTFE Coating for superior chemical compatibilityManufactured in a registered ISO 9001:2015 facility, as verified by SGS certification; autoclavableNote: TEFLON® is a registered trademark of The Chemours Company FC LLC and used under license by Bel-Art Products, Inc.