Sonor Primary Line of Glockenspiels developed as an alternative for elementary music education. The instruments are built in Sonors's german facilities and combine quality sound and advanced technical details at moderate cost.Each instrument offered includes one pair of SCH 13 double. Order case legs separatly see "4ST" below. mallets. The products featured here are the Sorprano model offered in a diatonic set, chromatic add-on set and Tenor -alto version in the same configuration. The case and legs as shown are options.