The D'Addario EJ80 Octave Mandolin Strings are designed for an 8-string banjo and are made of phosphor bronze material. These medium-gauge strings have a range of 12-46 and are adjustable for optimal playing experience. With an uncoated finish, they are suitable for beginners and come as a single unit. Perfect for octave mandolin players looking for reliable and quality strings from the trusted brand D'Addario.