Compensated design;Bore .591“ / .661“ = 15.0mm / 16.8mm;Brass bell Ø 11.8» = 300 mm;Gold brass leadpipe;Nickel silver outer slides;4 valves (3 top, 1 side action);Stainless steel pistons;Clear lacquer finish;Original VINCENT BACH 6 1/2AL Mouthpiece;Light-weight case with rucksack straps;