A standard tapered harp pin(#5), 3 in. long.
This pin requires a tapered hole in your harp neck. Drill a 15/64" hole first and then taper the hole to the appropriate depth with a #5 taper bit.
Use our tuning wrench for tapered pins for these pins.
Note - We used these pins on our large harps up until 2008 at which point we switched to threaded harp pins.