Feature: 1. FUNCTION: Measure the tail in straight line from the coil to the point where the wire stays in the butt grooves of the hammer2. METAL MATERIAL: The upright piano spring is made of high quality metal material, which is rust resistance and , and can be used with confidence 3. SPRING REPLACEMENT: Piano hammer butt springs can be used to replace worn, weak or broken springs in upright pianos 4. GREAT ACCESSORIES: Piano springs can be used for piano tuning tool parts, which is great accessory for piano players 5. SIMPLE : This is piano spring, which adopts fine workmanship, good elasticity, long service life, easy to use Specification: Item Type: Piano Spring Package List: 70 x Piano Spring |