Specification Brand : uxcell BulletPoint1 : Product Name: Ferrite Cores; Material: Ferroferric Oxide; Model: T68-10A BulletPoint2 : Inner Diameter: 9.2mm / 0.36"; Outer Diameter: 18mm / 0.71" BulletPoint3 : Height: 6.5mm / 0.26"; Total Size: 6.5 x 18mm / 0.26" x 0.71" (H*D) BulletPoint4 : Color: Black ,Gray; Net Weight: 10g BulletPoint5 : Size: 2pcs 9.2 x 18 x 6.5mm; Package Content: 2pcs x Ferrite Ring Toroid core iron Color : Black Gray 2pcs ItemName : uxcell 2pcs 9.2 x 18 x 6.5mm Ferrite Chokes Ring Iron Powder Toroid Cores Black Gray ItemPackageDimensions_Height : 7.62 centimeters ItemPackageDimensions_Length : 2.54 centimeters ItemPackageDimensions_Width : 5.08 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : electronic-component-ferrites Manufacturer : uxcell Material : ferrite ModelNumber : a18070600ux0040 PartNumber : a18070600ux0040 ProductDescription : This is a ferrite ring, not a magnet. It has no magnetism. Iron powder core is generally stored near signals of place. It has the characteristics of isolating eddy current, low permeability and restraining interference. Used widely in power transformers, current transducers, instrument transformers, inductors, chokes, ballasts, voltage stabilizers and regulators, welding transformers, broad band transformers, filters, etc.