DR flat wound Hi-Beam stainless steel bass strings are built on a round core unique in the industry. Hi-Beam bass strings require much more time care and extra steps to make than other strings. The extra effort DR expends making Hi-Beams results in a bass string that is highly flexible musically warm and renowned for durability unusually long life consistency and string-to-string balance. They don t eat your frets. Package of 5 medium bass strings 45-125.