Hi-Beams bass strings are constructed with a round stainless steel wire wrapped around a round core. This construction takes extra time and attention to detail, but the reward is an especially easy-playing and musical-sounding string with bright, resonant tone. Gauges 40-60-80-100-120. Gauges 40-60-80-100-120. Hi-Beam Stainless Steel Bass Strings are roundwound and constructed on a round core, which is unique in the industry. Hi-Beams require much more time, care, and extra steps to make than other bass strings. The extra effort DR expends results in a bass string that is highly flexible and musically bright without harshness. Hi-Beams are renowned for unusually long life, consistency, and string-to-string balance. They don't eat your frets. Choose them for brightness and ease of playing. They fit virtually all scale lengths up to 37-3/4".