A thick blank clarinet reed engineered for exceptional performance and consistency. 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. Offered in boxes of ten (10) and packs of two (2) reeds. The Reserve line for clarinet also includes Reserve, a traditional blank option, and Reserve Evolution, the thickest blank option.