Rico Reserve Classic Bb Clarinet Reeds, Strength 4.0, 10-pack Special cane treatment process that helps reduce reed warping Strength 4.0, Unfiled cut, box of 10 reeds Gradual tip shape, adding more tonal warmth; traditional tip thickness for a quick articulation Like the Reserve line, uses only the densest, lower-internode cane for longer durability and consistency Offered in strengths 2.0 to 4.5, including a special 3.5+ and 4.0+ strength