Mr.Power Guitar Chord Stamp Black Ink(3 Frets)/Ukulele(5 fret) DIY Mini Rubber Stamp(Black Ink) Fit for 3 frets(guitar) & 5 fret(Ukulele) Using for any guitar player, music teacher or Student. Perfect for Students or Songwriters You can refill flash ink when out of ink(drop a few drops of ink on the surface of stamp,absord it in a few minute by itself)