The latest model of the Tamaki model mouthpiece for Grant's thick-bore tenor trombone (silver). I tested it for a few days, but I've decided to stick with the first model, so I'm putting this one up for sale. There's no particular damage. * This is the most versatile concerto type among the multiple Tamaki 4G series mouthpieces from Grant. * The weight is almost the same as the first concerto model, but Mark 2 has a smaller inner diameter, from 25.95mm to 25.85mm. While the freedom is slightly reduced, the durability has been improved. This is a mouthpiece with a quality that can be called a near-complete form of the 4.5 size. (It feels slightly smaller than the numerical value due to the rim shape) * For those who feel that 5 is too tight but 4 is too big. * For those who don't like the air escaping easily with a deep cup or a thick throat, but want to produce a high-density sound with a lot of resonance. * For those who want a mouthpiece that will firmly support them in the most important moments when they get tired. If any of these apply to you, I think it's worth trying it for a while. Enjoy the good rabbit hole.