- ̗̀ Please be sure to read the profile ̖́- Original product from DAC, a wind instrument specialty store. This is a cushion for euphonium playing while seated. It's the thinner type (4cm thick) of the two available. It improved my posture and made playing much easier. I'm selling it because I no longer have a use for it. If you purchase it together with the mouthpiece I'm selling, I'll discount it by 100 yen (and ship them together).