The Mini-72 set uses individual Alnico 2 Rod magnets in a dual-coil format. No added steel , just mini-rods (. 156 Dia). It’s kind of like having 2 Front-Tele Pickups side by side but fatter, from both the increased aperture and the use of Alnico 2 magnets. The Magnetic Strength is almost 1000 Gauss like a Strat Pole Piece (. 187 Dia) but with the added Iron of the Alnico 2. A mix… A match… and basically a whole lot of fun. See the data sheet for the different specs for each pickup. Keep in mind that the Mini-72 set Pickups have a narrow string width sense and aren’t suitable in the bridge position of Floyd Rose equipped guitars. It was designed for the Gibson Tune-o-matic bridge width, and so it shall remain. The maximum string width should be about 2 inches (51mm). The Pole Pieces are spaced . 395 (10 mm) apart, with an overall width of 1.975 (50.1mm). No need for string grounding, so no shock hazard. Low-impedance output so you can sound the same through a cable as well as wireless. and on top of that a 2 pickup system only requires 1.3 Milli-Amps of 9 Volt battery power. IN THE BOXPACKAGE INCLUDES EMG'S EXCLUSIVE SOLDERLESS INSTALL SYSTEM: 2 25K VOLUME POT2 25K TONE POT1 BATTERY BUS1 STEREO OUTPUT JACK1 TWO PICKUP IN/OUT BUS2 PAIR MOUNTING SCREWS AND SPRINGS2 PICKUP CABLES4 CONNECT CABLES1 OUTPUT CABLE1 BATTERY CABLE