Model: TJFH6500SP Bore size: .441” (11.20 mm) Bell diameter: 6.06” (154.00mm) Bell material: rose brass Leadpipe: rose brass Finish: bright silver plate Valve material: stainless steel Trigger on 3rd valve slide Slides: Cupronickel Water keys: x2 TJ acoustic brace Case: Backpack style case with TJ logo Mouthpiece: Trevor James 4BF mouthpiece