Specification Brand : Bel-Art BulletPoint1 : Small removable pivot ring in the center adds to their versatility BulletPoint2 : Pivot ring minimizes the contact area of the bar to the vessel, reduces friction and lessens marring of plastic containers BulletPoint3 : Alnico magnet encapsulated in fad grade, usp class vi teflon pate low friction coating; durable and inert BulletPoint4 : Manufactured in a registered ISO 9001:2008 facility, as verified by SGS certification BulletPoint5 : Autoclave safe ItemName : Bel-Art F37111-0134 Spin Cylindrical Magnetic Stirring Bar, 8mm Diameter, 44.5 mm Length, Teflon PTFE (Pack of 50) ItemPackageDimensions_Height : 5 inches ItemPackageDimensions_Length : 5 inches ItemPackageDimensions_Width : 5 inches ItemPackageQuantity : 1 ItemShape : Cylindrical ItemTypeKeyword : science-lab-stirrer-bars Manufacturer : Bel-Art Products Material : Teflon PTFE ModelNumber : F37111-0134 NumberOfItems : 50 NumberOfPieces : 50 PartNumber : F37111-0134 ProductSiteLaunchDate : 2017-02-02T03:08:06.268Z StreetDate : 2017-06-12T00:00:01Z UnitCount : 50