This is the highest quality 18% nickel-silver fretwire, specially made for small instruments such as the ukulele. Made straight, not coiled to save you time and frustration when installing. We recommend you use a .022" fret slot. If you're using handtools, we sugest the Zona Fret saw and Miter Box. Fretwire is sold in 4-foot lengths (two 2-foot lengths), which is more than enough to finish a 18 fret Baritone ukulele.