The Thomann EP 604-3 Euphonium is engineered to cater to the needs of modern-day players. It incorporates three Périnet valves, which prevent sharp bends in the wind passage to maintain a smooth flow of air. The bore diameter of this euphonium is 14.5mm. Such a large bore size translates into warm and dark sounds. The body of this instrument is crafted from copper, a material that guarantees extreme durability. The nickel-silver outer sides add an element of radiance to the EP 604-3. The EP 604-3 is accompanied by a mouthpiece and a lightweight form-fitting bag with backpack straps and castors.