Features black crystal nylon trebles and basses made of a special blend of wire to deliver a base set that has a very rich, silky tone. The black crystal trebles are bright in tone and deliver speed at a higher velocity than any other string we make. This set is a medium hard tension set with our broadest tonal range between basses and trebles. Play faster and sound better with our High Velocity set! Pepe Romero Strings are powered by La Bella.