It’s a Franky slug coil and a 78 screw coil. So basically you get mismatched coils in regards to both winds and wire gauge. You get 2 separate resonant peaks and an unusual aggressive voicing for the deceiving lower DCR of the pickup. To my ears it’s aggressive yet thick at the same time. It’s my Goldilocks pickup. Not to hot, not to cold, just right. I’ve tried it with both A5 and A2 mags and like both. It’s going to be slightly hotter than the Duncan. For 80 or 85 dollars shipped usually within a week, not sure current pricing, it’s the best deal out there for custom pickups