Bocal screw Yany BooStar for Yamaha Special alloy, gold plated Yanagisawa S-bows

S-bow screw made from a special alloy
With white engraving, suitable for Yamaha saxophones
One base screw and two additional screws with different weights
This allows for three possible combinations for individual sound design
Special alloy, gold plated
The gold plated version has more brilliance/shine