Double bore .570» / .610» = 14.5 / 15.5 mm;Brass bell Ø 11» = 280 mm;Gold-brass leadpipe;Nickel silver outer slides;4 top-action valves Inline;Stainless steel valves;Finish: Clear coating;Original VINCENT BACH 6 1/2AL mouthpiece and valve oil ;Light case with backpack straps;