Harp Bridge Pins, Brass, Pack of 6. (Item Code: HPNBB) The overall length is approximately 1.5 inches long (38 mm). The length from the end to the string notch is approximately 1.3 inches (33.3 mm). They have a diameter of 5/32 inches (4mm). They are solid brass and have a groove at one end that holds the string. These pins are handmade so expect some variation in size. These bridge pins are meant to fit the following Roosebeck(TM) harps: Pixie Harp (TM), Heather Harp (TM), and Minstrel Harp (TM).