Lyons Classroom Guitar String Set 4/4 Size set Classroom Guitar String Set 4/4 Size set These strings sets are the original equipment supplied with Lyons Classroom Guitars, and are a suitable economical string replacement for the Lyons Classroom Guitars, and other classical guitars These strings sets are the original equipment supplied with Lyons Classroom Guitars, and are a suitable economical string replacement for the Lyons Classroom Guitars, and other classical guitars