Discover yourself why DAddarios Prelude strings are a favorite with so many teachers, students and parents! Solid steel core makes Prelude strings utterly dependable, and at a price that will not break the bank. Unaffected by temperature or humidity, quick tuning, stable pitch, and long lasting. Strong, bright tone, without edginess. Aluminum wound A and D (except for Extra Short D being nickel wound) and nickel wound G and C. Medium gauge, suitable for all players and instruments.