Replacement Hammer Butt Flange with cord for holding hammer butt spring. This is for the Yamaha style hammer butts, but will also work on other brands of pianos which have the same style of hammer butt. Flange is 29 mm in overall length. The distance from the center pin to the center of the flange screw hole is 16 mm. Available individually, in a set of 10 or in a set of 90.