A Mini Humbucker is similar to a Firebird and Epiphone pickups. The Firebird has non-adjustable pole pieces and the Epiphone has 6 adjustable 5/40, headless, slotted, machine screws. They measure about 2- 5/8″ long, 1- 1/8″ wide, 1-1/8″ high. The Mini Humbucker is also called the Deluxe Humbucker as used on the Les Paul Deluxe guitar. The Firebird and Epiphone pickups use a 3/48″ threaded leg for height adjustment. The Les Paul Deluxe Mini Humbucker has the pickup mounted to the modified P-90 mounting ring and it threads into threaded ferrules inserted into the body of the instrument.