1. Bone bridge saddle and nut are made of real cattle bone. The bone has minimal porosity and a great appearance. Its density and minimal porosity are features that yield good intonation and clarity. 2. 6pcs bridge pins are made of Brass with green abalone dot and brass circle on the head. Not only will these stunning pins make your guitar look marvelous, their density and rigidity provide better vibrational fer through the bridge compared to plastic, so your guitar will sound better too. 3. Fit for Martin,Taylor or most of brand acoustic guitar.It is not only bridge pins, but also a work of art with elegant appearance. 4. If you haven't tried Brass pins, you probably can't imagine the advantages. Feel the leap in sound quality. 5. These bridge pins can replace your lost or broken ones, are great accessory for your acoustic guitar. Bone Nut Size: 43mm x 6mm x 8.5mm Bone Saddle Size: 72mm x 3mm x 9mm Ebony Bridge Pins: Total Length: 30mm, Top Diameter: 7.6mm, Bottom Diameter: 4.5mm colour: gold + white Material: Brass+Bovine Bone+Plastic Package Contents: 6 x Bridge pins 1 x Nut 1 x Saddle 1 x Pins puller Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.