This is six feet of beautiful, durable 18% nickel-silver fret wire, in handy straight 8-inch lengths.This fret wire is identical to Stewart-MacDonald's #764 "Narrow/Low" fret wire, and can be used to repair/replace frets on an existing mandolin, banjo, dulcimer or other smaller instrument, as well as for new instrument building.The dimensions are as follows: Crown Width: .053" (1.2mm), Crown Height: .037" (.94mm), Tang Depth: .054" (1.2mm).A slot width of .023" is recommended for best results when installing this fret wire.