Musiclily Slotted Acoustic Guitar Ebony End Pins Endpin for Taylor Martin Guitar Parts, Black (Pack of 4) Fit to Martin,taylor or any most acoustic guitar Made by real ebony; it not only will these stunning pins make your guitar look marvelous, their density and rigidity provide better vibrational transfer through the bridge Pre-slotted,Top head size is 12.7MM diameter, bottom size is 6.2MM diameter Overall length is 29MM. Package included: 4 x guitar bridge pins