Feature: 1. Colorful Forms: This guitar sliding ruler features colorful shapes, with the five positions of the pentatonic scale presented in bright colors to help you remember them and clearly see how they relate to each other. 2. Excellent PVC Material: This guitar scale slide ruler is made of excellent PVC material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. 3. Multifunctional: This guitar pentatonic sliding ruler is multifunctional and is a tool to be used to practice pentatonic scales, whole tone scales and modal scales. 4. Easy To Use: This guitar fingerboard scale chart is simple to use, easy to read and understand, all you need to do is follow the markings on it to practice. 5. Wide Application: This plastic guitar scale slide ruler has a wide range of applications and can be used for lessons, practicing and more. Specification: Item Type: Guitar Scale Sliding Ruler Material: PVC Plastic Application Scope: Folk Guitar, Electric Guitar. Package List: 1 x Scale Slide Ruler Plate1 x Scale Slide Ruler Cover1 x English Manual