ProSteels are D'Addario's brightest and most magnetic bass strings. A specialized steel alloy delivers harmonically rich, brilliant high-end coupled with deep, tight lows that work in tandem to create the coveted "piano tone" steel players crave. Great for both articulate fingering or aggressive picking, ProSteels give you the extra edge and punch you need to cut through the mix. D'Addario offers a full range of bass guitar singles for all your replacement or customization needs. Fits super long scale basses with a string scale length of up to 38 inches. Perfect for replacement strings or customized sets. Made in the U.S.A. for the highest quality and performance. String gauge: .065.