Opened Fender Squier Strat style ST guitar, standard single coil size, fits for replacement drop-in 4-conductor so that it can be split, the pickup has 4 wires Ceramic magnets, wax potted, 9K ohm high output You can install it in the neck, middle, and bridge positions of the guitar. Note: This pickup is not reverse polarity designed Please check the wiring diagram in our product images.