- Hosco SOS-AG1 Nut Compensation Acoustic Steel Guitar; S.O.S. Nut compensation for Acoustic Steel guitar; Significantly improves intonation; Shims included to compensate for nut height; Easy to fit - the S.O.S. strip is simply slid under the strings in front of the nut; Scale length 643-650mm; S.O.S. thickness (6th/1st) : 1.3mm/1.2mm EUR 12.00 - See more - Buy online