Vandoren V12 Clarinet Reed 3.5 Box of 10

V.12 reeds(grey box) in strengths 2 1/2 to 5+ (2 1/2, 3, 3 1/2, 4, 4 1/2, 5, 5+)V.12 reeds are manufactured from cane tubes of the same diameter as those used for saxophone reeds. This leads to a higher manufacturing cost, as large diameter cane is more rare.V.12 reeds are thicker at each end:Thickness at the tip: .10mm (0.004 inch)Thickness at the heel: 3.15mm (0.124 inches, hence the name V.12)In comparing strengths, a V.12 strength 4 reed is almost equal to a Traditional strength 3 1/2 reed.