MechPort 3 Pack Valve Guide 15x19 mm 4.7x6.5 Compatible with Flugelhorn and Baritone Horn

- Broad Compatibility: Compatible with Yamaha, Compatible with Jupiter, Compatible with Besson, Compatible with Bach flugelhorn and baritone models; please verify 15x19 mm or 4.7x6.5 mm before purchase. - Smoother Valve Action: Plastic guides center piston travel for accurate port alignment and quieter operation during practice, rehearsal, and performance. - Size Matching: Includes 15x19 mm and 4.7x6.5 mm pieces to match common housings; measure your existing guide or consult a technician to select the best fit. - Reliable Response: Supports consistent feel across indoor concerts, marching practice, lessons, and studio sessions. - Easy Replacement: Direct swap during cleaning or rebuild with basic tools; ideal for school band rooms, home practice, outdoor parades, and ensemble rehearsals.