TMS Kobo Original Acoustic Improvement Goods: Spacer-kun This is a product to be placed between the body and the screws used. It is intended for use when you want a little more resonance or resistance. It's not just a solid block; it has a cavity inside to produce resonance. We have repeatedly created prototypes and determined the size and volume of the cavity. We believe it can be used with any manufacturer (Yamaha, Yanagisawa, Selmer). Price is for one piece (suggested retail price: 2000 yen). TMS Acoustic Improvement Goods #Saxophone #Yamaha #Flugelhorn #PiccoloTrumpet #WindInstrument