"Neck Screw Made in Earnest by a Mouthpiece Maker" This is the Gottsu original neck screw, completed using technology that precisely machines SV950 material. Focusing on how the shape and size of the three holes on the central side can greatly change the resistance, blowing feel, and tone, we created many prototypes and adopted the shape that performed the best. Moderate resistance and blowing feel. Characterized by sparkling edges and a thick sound. Please try the Gottsu original neck screw, which is particular about its beautiful shape and materials. * 0.7 Pitch (YAMAHA, Gottsu etc.) * 0.75 Pitch (Selmer, Yanagisawa, Wood Stone etc.) ※ Not compatible with Forestone and Cannonball. Manufacturer's Note 【Regarding SV950 Products】 SV950 products use high-purity silver, so there is a rare possibility of very small pinholes occurring during the manufacturing process. This is due to the nature of the material, and while we strive to minimize its occurrence, it may be difficult to completely prevent. We maintain thorough quality control and deliver only products that have passed strict inspection standards to our customers, but even if minute pinholes are found in the product you receive, please rest assured that there is no problem with the safety of use or the quality of the product. We appreciate your understanding of the characteristics of SV950 products.