Specification Brand : FIRST4MAGNETS BulletPoint : SPECIFICATION: 20 packs included, each pack includes one horseshoe magnet and one re-sealable tube of fine iron powder. 75mm x 39mm x 8mm. 2.95 in. x 1.54 in. x 0.32 in. BulletPoint1 : 2 cylindrical magnets BulletPoint2 : Pink dot denotes opposing poles (like poles) BulletPoint3 : Keepers at the end of the magnets to keep them in place BulletPoint4 : 1.5" length BulletPoint5 : Power Source needed for operation. An economical Eisco power source is PH0971DCAC which is not included Color : Assorted Colors ExternallyAssignedProductIdentifier1 : 5055641214205 ExternallyAssignedProductIdentifier2 : 05055641214205 ExternallyAssignedProductIdentifier3 : 849230046873 IncludedComponents : Horseshoe Magnet ItemName : Traditional Alnico Horseshoe Magnet - 3 in. x 1-9/16 in. x 5/16 in. - 2.21lbs Pull (Pack of 20) ItemPackageDimensions_Height : 2.73 millimeters ItemPackageDimensions_Length : 142.93 millimeters ItemPackageDimensions_Width : 10.15 millimeters ItemPackageQuantity : 1 ItemShape : U-Shape ItemTypeKeyword : science-education-magnetism-kits Manufacturer : Magnet Expert® Material : AlNiCo ModelNumber : F112-20 NumberOfBoxes : 1 NumberOfItems : 20 NumberOfPieces : 20 PackageLevel : unit PartNumber : F112-20 ProductDescription : These cylindrical magnets provide an excellent tool with which to visualize and kinesthetically experience the push and pull of magnetic fields. The markings on the cylindrical magnets denoting the poles are very helpful. The magnets come with keepers and a box for easy storage. ProductSiteLaunchDate : 2017-11-29T00:00:01.000Z PullForce : 1 kilograms Size : pack of 20 StreetDate : 2017-11-11T00:00:01Z SupplierDeclaredDgHzRegulation : unknown SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable SupplierDeclaredDgHzRegulation5 : not_applicable UnitCount : 20