2mm PGP Neck Joint Super Ring for Silver Tenor Saxophone "Nagasawa Seisakusho" original wind instrument boost item. Compatible models: Yamaha various models Yanagisawa (from T series to current WO) Selmer (mark VI to Jubilee, models up to Series III) Cannonball (fits just barely) *A 2mm "pink gold plated 950 silver ring" is attached to the neck joint of a tenor saxophone. It produces a sound with richer overtones than the 1mm version. ☆Representative 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 altissimo notes. Altissimo notes become fuller. Altissimo notes resonate better. In addition, many users have reported improvements in overall resonance and tone stability. Made using the same silver soldering and polishing process as rings. Quantity: 1 ring. Material: 950 silver Ring inner diameter: 27.6mm (with some error). Ring outer diameter: 29.6mm (with some error). Made to be slightly loose. Please give it a try. Nagasawa Seisakusho, combining the experience of a saxophonist who has won international competitions with manufacturing, designs and produces all-silver wind instrument boost items in their workshop in Kawagoe City, Saitama Prefecture. Thank you for your interest.