Seymour Duncan ZSL-1s Zephyr Silver Strat SET Seymour Duncan Zephyr™ Silver Pickups give you everything you love about electric guitar,but more. Richer tone,more explosive dynamics,more responsive touch,a deliciously dense but wide-open sound. Zephyr Silver pickups combine four distinct innovations unbound from pickup tradition: Silver Wire Coils — Known as "The Great Conductor" among metals,silver and silver-plated wire's sonic excellence is well established in high fidelity audio applications,including moving coil phono cartridges,vacuum tube amplifier output transformers and cabling. Just as silver in audio makes music reproduction more convincing and alive,in pickup coils it gives your guitar punchier,jumpier,burstier feel with harmonically dense,dripping tone. Nickel and Stainless Steel Bi-Metallic Pole Pieces — Combining these two premier transformer metals to shape and focus the magnetic field disturbed by your guitar's vibrating strings further contributes to the vivid,energetic sound of Zephyr Silver. Glass Fiberfill Nylon Bobbin — Every dialectric material imparts its own sonic properties. In listening tests of new,more stable bobbin materials,we chose glass-filled nylon for slight advantages in definition and detail,as well as excellent material stability and consistent finish. Cryogenic Treatment — Supercooling materials renders permanent improvement to their grain structure. Also an established enhancement in high-end audio,where cable,vacuum tubes and even entire electronic components are cryogenically treated for improvements in clarity and realism,we achieved similar results for guitar tone by cryogenically treating completed pickups,copper and silver alike. Cryo treatment enhances string definition and boosts the "way huge" potential of your guitar. Each of these options is now available with any Custom Shop order,but in combination they lend our new premium Zephyr Silver pickups uniquely fast transients,wider but smooth frequency response,deeply rich harmonics,and unprecedented midrange tone density,with audible gains in string detail,articulation and overall definition. Slighter touch produces expressive sound,yet peak dynamics are more explosive,making your guitar feel more energetic and alive. We consider Zephyr Silver the most expressive pickups so far. They are not inexpensive,but from squeaky clean to buzzsaw grind,you'll hear and feel more power,projection and expression from any electric guitar.