Genuine Floyd Rose German made 'R4' locking nutThis is an original Floyd Rose German made locking nut, manufactured from hardened steel.R4:Width: 1.6875"/42.85 mmRadius: 10"/254 mmHeight at D: .278"/7.10 mmE-E Center width: 1.4355"/36.45 mmString Spacing: .2631"/6.70 mmSeveral sizes are available, s..