Blackouts 7-string AHB-1
Same 9-volt active pickups as 6-string Blackouts, but built to direct retrofit nearly all 7-string electric guitars, thanks to two cover sizes. There are two versions of 7-string Blackouts: Phase I and Phase II. Phase I Blackouts are a direct retrofit for most passive 7-string humbuckers, including those by Seymour Duncan and and most other passive humbucker. Phase II Blackouts are a direct retrofit for the EMG-707 humbucker or other brands with same dimensions.
Seymour Duncan AHB-1s are also made for 6 and 8 string guitars.
Seymour Duncan Blackouts can be purchased separately or in a matched neck and bridge kit. All Seymour Duncan Blackouts pickups include all necessary mounting hardware, including pots, jack, and a battery clip.
Most of this info was obtained from the official link below
link
http://www.seymourduncan.com/products/electric/humbucker/high-output/blackouts_7stri/
