Attitude Humbucker - 7 string - set
Alnico V - Neck 14.5 KOhms, Bridge 21.8 KOhms
The 7 string bridge pickup comes in one size (61.2mm). There are two options for the look of the thing; black as pictured, or add a nickel cover for $40 for the set.
If you'd like your covers relic'd please let me know by adding a comment at the time of order.
Here's Gabe Dovaston (The Music Academy, Papamoa) doing a demo of the 7 string bridge pickup -