Metal euphonium, with case and mouthpiece. - Type: Euphonium - Material: Metal - Accessories: With case - Mouthpiece: YAMAHA This is a Soleil euphonium. Parts of the piston section have been repaired and replaced by YAMAHA. Apparently, the parts cannot be replaced with non-standard parts, but according to a YAMAHA technician, they use the same parts as their own, so if you want to replace parts, it's best to take it to YAMAHA. Regarding the accuracy of the sound, it produces a fairly accurate sound over the playable range of four octaves. It was sufficient for practice and hobby use. Accessories include an unused YAMAHA care set and a mouthpiece, but I will include the YAMAHA mouthpiece, which is more accurate than the original.