Specification Brand : Dynalon BulletPoint1 : Round, cylindrical shape BulletPoint2 : Provides better centering and creates less turbulence than a multisided shape BulletPoint3 : PTFE casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning BulletPoint4 : Smooth surface provides quicker cleanup and less risk of cross-contamination than bars with pivot rings and allows the bar to spin on the bottom of the container to disperse light sediment and air bubbles BulletPoint5 : Internal magnet made from alnico V, an alloy of aluminum, nickel, iron, and cobalt IncludedComponents : 1 Stir Bar ItemName : Dynalon 303715 PTFE Round Stirrer Bar, without Ring, 3/4" Length, 5/16" Diameter (Pack of 4) ItemPackageDimensions_Height : 1.27 centimeters ItemPackageDimensions_Length : 12.7 centimeters ItemPackageDimensions_Width : 7.62 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemShape1 : Round ItemShape2 : Cylindrical ItemTypeKeyword : science-lab-stirrer-bars ItemVolume : 0.02 milliliters Manufacturer : Dynalon Material : PTFE ModelNumber : DYNCR 303715 NumberOfBoxes : 1 NumberOfItems : 4 NumberOfPieces : 4 PartNumber : 303715 ProductDescription : PTFE Stir Bar, Plain, 13 x 8mm, (length X diameter) ProductSiteLaunchDate : 2010-11-03T08:00:01.000Z Size : 3/4" Length, 5/16" Diameter (Pack of 4) StreetDate : 2017-05-15T00:00:01Z SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 4 UnspscCode : 52151600