Harp Bridge Pins, Long, Pack of 6 (Item Code: HPNB-L) These bridge pins are meant to fit the Heather Harp (TM), and Minstrel Harp (TM). They are approximately 1.57 inches long, with a 5/32" diameter (40mm L x 4mm D). The one end has a grove that holds the string. These pins are hand made so expect some variation in size.