Damper Springs Damper Springs in graded sets (75b) each set contains 30 bass, 26 middle, & 16 treble springs Bass: 0.036″ (0.914mm) Middle: 0.032″ (0.813mm) Treble: 0.028″ (0.71mm) To order or check prices of any of the above items please phone me on 01494 758713, or email martin@heckscher.co.uk