This is six feet of beautiful, durable 18% nickel-silver fret wire, in handy 8-inch straight lengths. This fret wire is identical to Stewart-MacDonald's #141 "Medium/High" fret wire. This fret wire can be used to repair/replace frets on an existing guitar, or for new instrument building. The dimensions are as follows: Crown Width: .095" (2.41mm); Crown Height: .045" (1.14mm); Tang Depth: .073" (1.85mm). A slot width of .023" is recommended for best results when installing this fret wire.