5-1/2" Outward Pressure Spring For Foot Pump Bellows - Player Piano Repair
£35.64
This is the spring usually used inside the pump reservoir(s) of foot pumped player pianos. Strength is approx 5-6 lbs. Length about 5-1/2". Blued spring steel. PPC catalog #272 (indicates 6" but these are a bit shorter).
