The Seymour Duncan Phase II Bass Guitar Passive Soapbar Pickup Set offers a passive alternative to battery-powered pickups. The tone is simple and organic, with the added warmth and punch you expect from a great passive pickup. Phase II Passive Soapbars are direct replacements and generally require no instrument modifications. The full-length dual blade accommodates maximum string spacings up to 2.70 inch or 68.5 mm.