Silver plate Adjusted, fully functional Good airtightness Piston work and slide action are all smooth. There are no dents that can be seen, and no peeling of the plating. This is a higher-end model than the STR-600. Although it lacks the stopper screw on the 3rd slide, it will not fall out. The playing feel is also different. It can be said to be for intermediate to advanced players. The playing feel is similar to a Bach TR-400. Accessories include a maintenance set and a hard case. ★ Mouthpiece not included.