INS-20225 is a premium classical guitar string sets. All treble strings are sorted by a sophisticated computer-controlled laser machine which performs diameter and tension measurements, ensuring true-sounding, precise trebles in every set. Vivaldi Spanish Classical Guitar Set basses are wound using silver-plated copper on a multi-filament nylon core for consistent and warm, yet projecting tone.
Diameter Chart
| Diameter | |||
| Item # | Note | Inches | mm |
| INS-20225-1 | E | 0.028 | 0.72 |
| INS-20225-2 | B | 0.032 | 0.81 |
| INS-20225-3 | G | 0.040 | 1.02 |
| INS-20225-4 | D | 0.030 | 0.74 |
| INS-20225-5 | A | 0.035 | 0.89 |
| INS-20225-6 | E | 0.043 | 1.09 |