All Silver Neck Joint Super Ring PGP (for Yanagisawa Soprano) 2mm "Nagasawa Seisakusho" original wind instrument boost item. * A 2mm "pink gold plated 950 silver ring" is attached to the neck joint of a Yanagisawa soprano saxophone. It produces a sound with richer overtones than the 1mm version. 2mm is recommended for soprano saxophones. ☆ Typical characteristics of each surface finish ☆ Pure Silver: Characterized by the soft tone of silver. GP: Characterized by a rich resonance with good articulation. PGP: Characterized by a warm resonance. Effects: Easier to produce flageolets. Flageolets sound fuller. Improved resonance of flageolets. In addition, many users have reported other benefits, such as a more overall resonant and settled tone. Made using the same silver soldering and polishing method as rings. Quantity: 1 ring. Material: 950 Silver Inner diameter of the ring is 17.0mm (with some error). Outer diameter of the ring is 19.0mm (with some error). Made to be slightly loose. Please give it a try. Nagasawa Seisakusho designs and manufactures all-silver wind instrument boost items in its workshop in Kawagoe City, Saitama Prefecture, combining the trial playing and production by a saxophone player who has won international competitions. Thank you for your patronage.