This is a popular and rapidly trending mouthpiece ring for tuba. This is the normal model with a hammered surface. When attached, it helps to create a solid core to the sound. The following is an excerpt from the store's website (reprinted with permission): Introducing the MP ring developed with a new concept! Focusing on resonance and reverberation, it achieves a stable sound from low to high notes. 《 About the silver950 MP ring 》 While general silver accessories often use silver925, this product uses Silver950 material with even higher purity, and has undergone heat treatment, hammering, and special processing, and has been developed and designed with the following four concepts: ① Sound tightened by hammering ② The resonance of solid silver (intentionally creating gaps to resonate) ③ Sound changes due to heat treatment ④ Realizing these three in a detachable form 《 N Series (Normal Hammering) 》 ・Width 5mm ・Standard for all series ・For those who tend to have a higher pitch in the higher register ・Mochi-like tone * Shipping is available on weekdays, excluding Saturdays, Sundays, and holidays.