Savarez Cantiga Polished 510CJH High Tension Classical Guitar Strings, Full Set. Hand Polished Cantiga full set of three strings High Tension D,A,E Basses complemented with the New Cristal High Tension trebles. The polishing smooths out the winding and aids in the reduction of string noise. Note: The technique of polishing takes away the silver plating slightly exposing the copper wire. As a result, the color may vary from silver to brown to gray.