Tree of Life Guitar Fretboard Inlay Sticker Markers Green Color It is fit for any type,19 frets, 20 frets, 21frets, 22frets and 24 frets.Electric guitar, acoustic guitar. Easy to install and remove quickly at any time. Make your guitar looks more beautiful and eye-catching. You'll not feel strange when you playing the guitar due to the ultra thin design. It won't change the sound effect.