D'Addario Reserve Classic Bb Clarinet Reeds, Strength 3.5+, 10-pack The D'Addario Reserve is a thick blank reed that offers a rich, warm tone Ideal for the advancing student and professional 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 3.5+ and 4.0+ strengths The Reserve line for Bb clarinet also includes a traditional blank option: Reserve