This is a popular and rapidly trending mouthpiece ring for trumpets. It's a normal model with reverse hammering. When attached, it helps to create a solid core to the sound. The following is an excerpt from the retailer's website (permission to reprint has been obtained): 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 a higher purity Silver950 material, and has undergone heat treatment, hammering, and special processing, designed and developed 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 《 R Series (Reverse Hammering) 》 ・Width 5mm ・For those who want a more focused sound ・For those who tend to have their pitch drop as they go higher ・For those who feel the high range is too thin *Shipping is available on weekdays, excluding Saturdays, Sundays, and holidays.