Rico Revserve tenor sax reed, strength 4, crafted from high-density lower-internode cane, high-density cane produces more durable, consistent reeds, color video inspection sorts cane quality, optical laser measurements ensure accuracy, state-of-the-art polishing creates a smooth surface, precision natural-diamond cutting blades maintain reed consistency, Reed VitalizerTM 2-way humidity control packs protect reeds from cracking, 5pcs. per pack