Gottsu SV950 GP Sax Neck Screw Gottsu Saxophone Neck Screw Gold Plated Finish 【For Selmer, Yanagisawa】 This is a Gottsu original neck screw (neck fastening screw) made with SV950 material, precisely machined. It has a gold-plated finish. The shape and size of the "three holes" on the central side, which change the resistance, blowing feel, and tone, were chosen after many prototypes to be the best. It features a moderate resistance and blowing feel, with a sparkling edge and a thick sound. 【Types】 ・0.7 Pitch (Gottsu, YAMAHA etc.) ・0.75 Pitch (Selmer, Yanagisawa etc.) ※Not compatible with Forestone and Cannonball