Specification Brand : Bel-Art BulletPoint1 : Alnico magnet encapsulated in fad grade, usp class vi teflon pate low friction coating; durable and inert BulletPoint2 : Interrupted profile provides greater surface area and added turbulence when compared to the smooth surface of cylindrical bars BulletPoint3 : Pivot ring aids in reducing friction and chattering (F37110-1218 does not have a pivot ring) BulletPoint4 : Autoclavable BulletPoint5 : Manufactured in a registered ISO 9001:2008 facility, as verified by SGS certification ItemName : Bel-Art F37110-1238 Spin Octagon Magnetic Stirring Bar, 9.5mm Diameter, 12.7 mm Length, Teflon PTFE (Pack of 50) ItemPackageDimensions_Height : 5 inches ItemPackageDimensions_Length : 5 inches ItemPackageDimensions_Width : 5 inches ItemPackageQuantity : 1 ItemShape : Octagon ItemTypeKeyword : science-lab-stirrer-bars Manufacturer : Bel-Art Products Material : Teflon PTFE ModelNumber : F37110-1238 NumberOfItems : 50 NumberOfPieces : 72 PartNumber : F37110-1238 ProductDescription : STIR BARS, MAGNETIC, PTFE, ”X” SHAPED Shape of stir bar creates a deep vortex and provides stability during stirring. ProductSiteLaunchDate : 2017-02-02T03:05:41.079Z StreetDate : 2017-06-12T00:00:01Z UnitCount : 50