From Fender:
The Hand Wound ‘69 Stratocaster pickups produce one of the most revered guitar sounds in popular music history-the full, punchy late- ’60s blues rock tone that ruled the era from Monterey on the West Coast to Woodstock on the East Coast. Because of the clarity and transparency created by the unique coil wind and magnet structure, the ‘69 pickup design works especially well with pedals allowing the low end to thump and the high end to soar. This set features a RWRP middle pickup for superior hum cancelation.
Bobbin Material: Fiber
Cover Color: Aged White
DC Resistance: 5.8K
Inductance: 2.2 Henries
Lead Wire: Cloth-covered
Magnet Type: Alnico 5
Magnet Wire: Enamel-coated
Pole Pieces: Staggered unbeveled
Configuration: SSS