This is an EMPTY ToneStorm Series cartridge in full size, capable of holding two humbuckers, two or three single coils or a combination of single(s) and humbucker. You can install any brand of passive or active pickup, just let us know what holes (pickup configuration) you need and what color top plate. This cartridge is reversible meaning you can flip it around to put the neck pickup in the bridge position, and vice versa. No soldering is needed, just a simple small screwdriver will attach your pickup wires to the terminal strips. Wiring diagram is included.