Hi-Beam stainless steel bass strings are round wound 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 making Hi-Beams results in a bass string that is highly flexible and musically but not harshly bright. They are renowned for durability, unusually long life, consistency and string-to-string balance. They don’t eat your frets. ​HI-BEAMS are the string to choose for brightness, punch and ease of playing. Hi-Beam bass strings require much more time, care and extra steps to make than other bass strings. Material: Stainless Steel. Round Core Wire with Ball End. Gauges: 45, 65, 85, 125.