Seymour Duncan 7-String Mark Holcomb (Periphery) Signature Alpha & Omega Pickup Set Black w/ 3 Sets of Strings : Amazon.ca: Musical Instruments, Stage & Studio
Seymour Duncan Mark Holcomb signature Alpha and Omega pickups for seven string – review | Lone Phantom
Seymour Duncan Mark Holcomb Alpha Omega 7 String Pickup Set - 800315002689