Thomastik-Infeld Infield Blue strings radiate strong power and brilliance. Mix and match with in the Infield Red and Blue string system to realize your sound ideas! The perfectly attuned strings with identical tension enable you to modify your tone and assemble your sound to your individual liking, personal needs and unique style! Infield Blue strings radiate strong power and brilliance. Mix and match with in the Infield Red and Blue string system to realize your sound ideas! The perfectly attuned strings with identical tension enable you to modify your tone and assemble your sound to your individual liking, personal needs and unique style! Violin set, 4/4 size.