Features Key: Eb/D Bore: .450-inch Leadpipe: Standard Leadpipe Material: Yellow Brass Bell: Two 4-1/2-inch One-Piece Hand-Hammered Tunable Bells with Flat Rim Bell Material: Yellow Brass Valves: Monel Pistons 1st Valve Slide Adjustment: Split Ring 3rd Valve Slide Adjustment: Fixed Ring Features: One-Piece Hand-Hammered Bell with Flat Rim; Special Acoustic Bell Treatment; Enhanced Radius Ferrules; Two Sets of Valve Guides (Brass and Plastic); Two Separate Sets of Slides for D and Eb; Deluxe Bell Engraving Description Product Description The ADE190 Artisan features a .450-inch bore plus two 4-1/2-inch one-piece hand-hammered tunable bells with a flat rim and special acoustic treatment for a pure, responsive tone. The ADE190 also features separate sets of slides for D and Eb. Mouthpiece NOT included.