Ideal for the advancing student and professional Crafted using a groundbreaking new digital vamping process, for ultimate quality control, precision, and consistency Expertly designed and made in the USA from naturally-grown cane from D'Addario's own foreign fields | Available in half strengths, from 2.0 to 4.5, with special 3.0+ and 3.5+ strengths The Reserve line also includes options for Bb clarinet, Eb clarinet, and all saxophone voices |