Modular system Infinity model Bore .547'' = 13.9 mm Brass bell Ø 8.5'' = 216 mm One-piece hand-hammered bell with flat cup rim Patented infinity (axial-flow) model, ball-bearing Reversed main tuning slide with yellow brass crook Nickel silver inner slide, yellow brass outer slide Without mouthpiece Deluxe case CA1867 Finish: Clear lacquer A47I Made in United States