The 730 Series features a .470-inch bore and long body construction designed for easy tone production plus nickel silver slides that are resistant to corrosion that would cause stuck slides.
- Key: Bb
- Bore: .470-inch
- Leadpipe: Kanstul "O"
- Leadpipe Material: Yellow Brass
- Bell: 4-3/4-inch Two-Piece
- Bell Material: Yellow Brass
- Valves: Monel Piston
- 1st Valve Slide Adjustment: N/A
- 3rd Valve Slide Adjustment: Adjustable Ring
- Features: Hand Lapped Monel Piston Valves; Nickel Silver Slides and Trim
- Case: Molded Plastic
- Mouthpiece: Kanstul 7C