Used in conjunction with a magnetic stirring plate, Spinbar® stir bars enable uniform, consistent, and thorough mixing of chemical solutions.Multi-faceted shape provides greater surface area and added turbulence for more vigorous, thorough mixing when compared to the smooth surface of cylindrical barsPivot ring allows the Spin Bar to “rock” while spinning for better mixing conditions (F37110-1218 does not have a pivot ring)Alnico magnet encapsulated in FDA Grade, USP Class VI Teflon® brand PTFE coating; Superior chemical compatibilityAutoclavableManufactured in a registered ISO 9001:2015 facility, as verified by SGS certificationTEFLON® is a registered trademark of The Chemours Company FC LLC and used under license by Bel-Art Products, Inc.