Used in conjunction with a magnetic stirring plate, Spinbar® stir bars create uniform, consistent, and thorough mixing of chemical solutions.Contoured egg shape is ideal for use in round-bottom vessels and flasks, ensuring complete mixingOffers minimal contact when used in plastic containers; minimizes scrapingEgg shape provides a pivot point without a separate ring for smoother mixingAlnico magnet encapsulated in FDA Grade, USP Class VI Teflon® brand PTFE Coating; the three smallest sizes have a cylindrical magnet instead of egg-shapedManufactured in a registered ISO 9001:2015 facility, as verified by SGS certification; autoclave safeNote: TEFLON® is a registered trademark of The Chemours Company FC LLC and used under license by Bel-Art Products, Inc.