From Lollar Pickups: "Our 7-string humbuckers are available in Low Wind Imperial® or standard Imperial® versions. Ohm readings are higher than the 6-string versions due to longer coils, but overall performance will be the same. Pole spacing center-to-center of the two outside poles is 2.412", height adjustment location is 3.5" center-to-center, and overall size is 3.05" by 1.425". The short leg base plate is approximately .25" deep and foot shape may vary from to square to rectangular. Sold as singles or as sets and available in double black exposed bobbins only. Single conductor braided shield lead wire and 4 conductor lead wire is available."
DC: Neck 8.5K, Bridge 9.4K