Middle pickup (red/black wire): 5.6k, 2.0H - reverse wound/reverse polarity (RWRP) for hum cancelling in switch positions 2 and 4 ; 50mm pole piece spacing. Middle pickup (red/black wire): 5.7k, 2.1H - reverse wound/reverse polarity (RWRP) for hum cancelling in switch positions 2 and 4 ; 52mm pole piece spacing.