Sliding Ruler - tool for the practice of PENTATONIC, DIATONIC and MODE scalesPentatonic Sliding Ruler for Guitar The essential tool for ALL Guitarists FOR GUITARIST OF ALL LEVELS - Give yourself the gift of having the "ALL IN ONE" tool to practice your scales! Instructions included. COLORFUL SHAPES - The five positions of the pentatonic scales are presented in bright colors to help you memorize them and clearly see their relation to one another. FOR BEGINNERS - Learn your first pentatonic scale in no time and impress yourself and your friends around! FOR MORE ADVANCED GUITARISTS -Practice your pentatonic scales, your Blues scales, your diatonic scales and the seven modes on any key by having the complete fretboard in front of you! Discover combination for chords by clearly seeing the degrees of the scales everywhere on the fretboard ! size: 28 x 8cm Material: PVC colour: As shown Package Contents: 1 x Guitar Sliding Ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.