Our 'Dog-Eared' version of vintage-spec P90-style guitar pickups, featuring screw-adjustable pole pieces. The Nickel-finish K-90 has Alnico V bar magnets for a more 'vintage warm tone' while the Black K-90 has Ceramic magnets for more top-end brightness and output. The P90-style pickup is a well-loved single-coil for those that love a tone somewhere in-between standard single-coils and humbuckers. More open than humbuckers while being thicker and warmer than single-coils. The "Dog-Ears' have historically appeared on Les Paul and SG 'Junior' as well as Casino type guitars and adds a different and rather cool look. PLEASE NOTE: While the BLACK K-90 has a flat underside to the cover, the NICKEL K-90 has a curved underside to the cover. Please check the DIMENSIONS here Resources - Entwistle Pickups before purchase. Our current specifications are: BLACK / Ceramic magnet / DCR 7.5K Neck 7.5K Bridge NICKEL / Alnico V magnet / DCR 7.8K Neck 8.5K Bridge DC Resistance Magnet type Pole spacing Potting Colour options 7.5k / 7.8K Bridge7.5k / 7.8K Neck Ceramic / Alnico V50mm Bridge48mm Neck Wax pottedBlack / Nickel Please note: Each selection is for one pickup. If you require a set you will need to select additionally for each one. Alan Entwistle guitar pickups are supplied unboxed, with mounting screws and springs (where model-appropriate). A wiring diagram showing a typical wiring configuration is available on our website. We recommend that an experienced guitar technician installs your guitar pickups.