431351 Product features: front A scale of 80 mm 2. The classical Guitar 12/14 product strings from the default value (Classic Guitar) 3. 12/14 4/5/6 string Bass strings from the default values (Bass Guitar) 4. 12/14 Electric Guitar strings from the default * lower limit (Electric Guitar Low) 5. 12/14 Electric Guitar strings from the default value * ceiling (Electric Guitar) High 6. 12/14 folk Guitar strings from the default value (& Guitar) Product features: back A. The first one refers to the plate width 40 mm， 42 mm and 45 mm space between measured values and strings 2. Top first refers to the width of 38 mm， 41.5 mm， 43 mm space between measured values and strings 2. Top first refers to the width of 50 mm (classical， Classic)， 45 mm (5 string bass)， 38 mm string bass (4) the distance between measured values and strings Three. The first one refers to the width of 52 mm (classical， Classic)， 42 mm (4 string bass)， 40 mm string bass (4) the distance between measured values and strings Package included:1 x Guitar Bass String Pitch Ruler