Ideal for the advancing student and professional, the D'Addario Woodwinds Reserve Classic B? Clarinet reed has a thick blank that offers a rich, warm tone, a heavy spine that promotes dynamic flexibility and exceptional tone quality in all registers, a narrow rail slope to produce consistency of response, and a traditional tip thickness for ease of articulation.Expertly designed and manufactured in the USA using naturally-grown cane from D'Addario's own foreign fields, D'Addario has pioneered the first practical and precise system to digitally measure and cut the incredibly complex geometrical patterns necessary to re-invent single reeds. Reserve reeds are cut to the tightest tolerances in the industry, offering the most consistent performance.Reserve B? Clarinet reeds are available in half strengths, from 2.0 to 4.5, with special 3.5+ and 4.0+ strengths. They are offered in packs of 2 or 10 individually packaged reeds.D?Addario Woodwinds Reserve reeds are designed with the 21st century performer and educator in mind. Innovative, inspired designs meet revolutionary manufacturing processes for unparalleled consistency, ease of response and tonal beauty.