It's in beautiful condition. Please make your purchase after judging and agreeing with the photos. Current 3rd generation. Nickel. The 2nd rim, favored by the inventor, Adam Rapa. I think the completion is the highest. Inner diameter of about Bach 3C to 1-1/2C. Semi-flat wide rim, increasing stability and endurance. The cup is a UV shape, about the same as Bach D. My personal opinion: When I put air in, the powerful sound that dominates the space is amazing, unlike anything I've experienced before. When played softly, it also has a soft tone characteristic of Lotus, and I think it's very good for pop music, which requires diverse expressions. I also purchased 2S and 2XS, but the manufacturer said that the 2nd rim has a relatively large inner diameter, so a depth up to the M2 cup is recommended. I also played with shallower sizes, sacrificing the quality of the low notes. The bright sound of nickel is wonderful. Description: The M2 was added for commercial players such as lead and studio players, in response to the demands of players who want a hotter and more aggressive sound than the M cup. A cup that has taken a step towards a real lead mouthpiece, with a slightly shallower depth than the M cup, a tight 3.6mm throat, a brighter tone backbore, and the unique color of nickel silver. A sound more like a lead mouthpiece than the M cup. It is ideal for players who say "I can't play a shallow cup" because it has more cup volume than an actual lead cup. Also suitable for high-note ballads in big bands and when playing in the low and mid-range. It provides a richer and more musical nuance than a typical lead piece. Comparison: Monette B4LD S1, Bob Reeves 43M692, Schilke 14B3A, YAMAHA 14B4 Lead players who seek the same bright tone as lead players and a "comfortable feel" with the "non-aggressive" energy unique to deep cups. Recommended for horn sections. Players who want to significantly improve access to the high range and seek a "brighter, tighter sound" but are not good with shallow cups. 2nd players in big bands who want to keep up with the lead player in Soli parts, but want to play with a fulfilling sound in solos. For those whose piccolo trumpet sound is hard or blurry.