David Gilmours connection with the GHS Boomers series goes back to 1979 when he started using them on Pink Floyds “The Wall” project. GHS Strings is the first choice for many of the worlds most renowned professionals including Jack White Pearl Jam and Green Day. All GHS products are manufactured with one objective – to provide players with products that continually exceed their expectations. Features/Specifications: String Gauges: .0105 .013 .017 DY30 DY40 DY50