Blued steel.
8" Outward Pressure Spring For Foot Pump Bellows - Player Piano Repair
5-1/2" Outward Pressure Spring For Foot Pump Bellows - Player Piano Repair
Gulbransen Pressure Spring For Foot Pump Bellows - Player Piano Repair
SEAFRONT French Horn Mouthpiece Pressure Reducing Valve, Brass Material, Adjustable Pressure Tool for Breath Control and Playing Ease for French Horn Players (Gold)
SEAFRONT French Horn Mouthpiece Pressure Reducing Valve, Brass Material, Adjustable Pressure Tool for Breath Control and Playing Ease for French Horn Players (Silver)
Replacement spring for advanced chromatic harmonica handy metal textured torsion spring and constant pitch control harmonic spring with precision adjusted
