The Porter Smooth-Classic Humbucker set is a versatile set for all types of styles and guitars. In the neck is the Porter Smooth Humbucker (AlNico 2) and in the bridge is the Porter Classic Humbucker(AlNiCo 5). You can go from a blues and jazz tone in the neck to a classic rock sound in the bridge. With the two different magnets in the neck and bridge, you get a great blend of the two in the middle position with a three way switch. 4 Conductor Hookup Wire.