"GHS Bass Boomers 5-String set with High C. Gauges are 030-100. Extra Long Scale. 38" Winding LengthDYB30X, DYB45X, DYB65X, DYB80X, DYB100XGHS Bass Boomers are one of the most popular bass strings in the world. Utilizing a nickel-plated steel wrap wire (with a special combination of stainless steel and nickel-plate on the low E and B strings) over a hex core, Bass Boomers have a distinctive low-mid punch that sits well in any musical genre. This IS your power string."