Tuning Pins for Harpsichord Dulcimer Zither or Harp - 50 Pins Nickel Plated 50 Tuning Pins for Dulcimer Zither Harpsichord or Harp Nickel Plated Finish Diameter: .198" (5.03mm). Length: 1-5/8" (41.275mm) High quality pin Top of the square portion of the pin is approximately 1/8" (4mm)