The "Yany BooStar," a neck screw that boosts resonance and produces a rich tone. Attaching it creates a moderate resistance, smoothing the flow of air. The sound becomes cohesive across all registers, resulting in a voluminous tone. Product Name: Yany BooStar (for Selmer and Yanagisawa) Type: PGP (Pink Gold Plate) Reference Price: 13,200 yen (tax included) *This product is for Selmer and Yanagisawa. Please contact Yanagisawa or a musical instrument store for compatibility with other manufacturers. The screw specifications (type) differ depending on the manufacturer. Shipping included.