Titanium piston buttons. Compatible with V.Bach trumpets. The response in soft passages is exceptionally good, and volume control is very easy. The sound's contours become clear. The characteristic sluggishness of Bach trumpets disappears, and the sound rises crisply. Even in large ensembles, the sound doesn't get buried and has the impression of cutting through and flying far. It feels like the operability is improved while maintaining the original performance and tone of the trumpet. It also seems suitable for big bands, marching bands, and piccolo trumpets. Because the appearance is the same as the original, you can easily try it. These are newly manufactured custom parts made only by UPMAKE. Please give them a try. Compatible with current 180ML and 190ML models.